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Finding the Fourth Proportional to 13,216.84, 18,239.78 and 7,248.76

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Solution

The fourth proportional to 13,216.84, 18,239.78 and 7,248.76 is: 10,003.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,216.84 : 18,239.78 = 7,248.76 : x
  2. Step 2: Convert to fraction form
    13,216.84/18,239.78 = 7,248.76/x
  3. Step 3: Cross multiply
    13,216.84x = 18,239.78 × 7,248.76
  4. Step 4: Simplify right side
    13,216.84x = 132,215,760.20
  5. Step 5: Solve for x
    x = 132,215,760.20/13,216.84
  6. Step 6: Final answer
    x = 10,003.59

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Half scale
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Double scale
Find fourth proportional to 13,217.84, 18,241.16 and 7,249.76
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.