Home / 38,720.56-53,434.02-21,724.43

Finding the Fourth Proportional to 38,720.56, 53,434.02 and 21,724.43

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Solution

The fourth proportional to 38,720.56, 53,434.02 and 21,724.43 is: 29,979.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,720.56 : 53,434.02 = 21,724.43 : x
  2. Step 2: Convert to fraction form
    38,720.56/53,434.02 = 21,724.43/x
  3. Step 3: Cross multiply
    38,720.56x = 53,434.02 × 21,724.43
  4. Step 4: Simplify right side
    38,720.56x = 1,160,823,359.94
  5. Step 5: Solve for x
    x = 1,160,823,359.94/38,720.56
  6. Step 6: Final answer
    x = 29,979.51

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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.