Home / 21,998.76-30,317.56-15,625.60

Finding the Fourth Proportional to 21,998.76, 30,317.56 and 15,625.60

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Solution

The fourth proportional to 21,998.76, 30,317.56 and 15,625.60 is: 21,534.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.76 : 30,317.56 = 15,625.60 : x
  2. Step 2: Convert to fraction form
    21,998.76/30,317.56 = 15,625.60/x
  3. Step 3: Cross multiply
    21,998.76x = 30,317.56 × 15,625.60
  4. Step 4: Simplify right side
    21,998.76x = 473,730,065.54
  5. Step 5: Solve for x
    x = 473,730,065.54/21,998.76
  6. Step 6: Final answer
    x = 21,534.40

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Half scale
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Double scale
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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.