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Finding the Fourth Proportional to 22,216.76, 30,616.90 and 15,918.20

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Solution

The fourth proportional to 22,216.76, 30,616.90 and 15,918.20 is: 21,936.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,216.76 : 30,616.90 = 15,918.20 : x
  2. Step 2: Convert to fraction form
    22,216.76/30,616.90 = 15,918.20/x
  3. Step 3: Cross multiply
    22,216.76x = 30,616.90 × 15,918.20
  4. Step 4: Simplify right side
    22,216.76x = 487,365,937.58
  5. Step 5: Solve for x
    x = 487,365,937.58/22,216.76
  6. Step 6: Final answer
    x = 21,936.86

Related Problems

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Half scale
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Double scale
Find fourth proportional to 22,217.76, 30,618.28 and 15,919.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.