Home / 21,291.12-29,359.48-15,905.12

Finding the Fourth Proportional to 21,291.12, 29,359.48 and 15,905.12

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Solution

The fourth proportional to 21,291.12, 29,359.48 and 15,905.12 is: 21,932.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.12 : 29,359.48 = 15,905.12 : x
  2. Step 2: Convert to fraction form
    21,291.12/29,359.48 = 15,905.12/x
  3. Step 3: Cross multiply
    21,291.12x = 29,359.48 × 15,905.12
  4. Step 4: Simplify right side
    21,291.12x = 466,966,052.54
  5. Step 5: Solve for x
    x = 466,966,052.54/21,291.12
  6. Step 6: Final answer
    x = 21,932.43

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Double scale
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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.