Home / 38,718.22-53,428.08-21,720.20

Finding the Fourth Proportional to 38,718.22, 53,428.08 and 21,720.20

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Solution

The fourth proportional to 38,718.22, 53,428.08 and 21,720.20 is: 29,972.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,718.22 : 53,428.08 = 21,720.20 : x
  2. Step 2: Convert to fraction form
    38,718.22/53,428.08 = 21,720.20/x
  3. Step 3: Cross multiply
    38,718.22x = 53,428.08 × 21,720.20
  4. Step 4: Simplify right side
    38,718.22x = 1,160,468,583.22
  5. Step 5: Solve for x
    x = 1,160,468,583.22/38,718.22
  6. Step 6: Final answer
    x = 29,972.16

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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.