Home / 39,440.59-54,428.07-21,535.20

Finding the Fourth Proportional to 39,440.59, 54,428.07 and 21,535.20

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Solution

The fourth proportional to 39,440.59, 54,428.07 and 21,535.20 is: 29,718.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,440.59 : 54,428.07 = 21,535.20 : x
  2. Step 2: Convert to fraction form
    39,440.59/54,428.07 = 21,535.20/x
  3. Step 3: Cross multiply
    39,440.59x = 54,428.07 × 21,535.20
  4. Step 4: Simplify right side
    39,440.59x = 1,172,119,453.82
  5. Step 5: Solve for x
    x = 1,172,119,453.82/39,440.59
  6. Step 6: Final answer
    x = 29,718.61

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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.