Home / 39,355.76-54,310.99-21,450.78

Finding the Fourth Proportional to 39,355.76, 54,310.99 and 21,450.78

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Solution

The fourth proportional to 39,355.76, 54,310.99 and 21,450.78 is: 29,602.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,355.76 : 54,310.99 = 21,450.78 : x
  2. Step 2: Convert to fraction form
    39,355.76/54,310.99 = 21,450.78/x
  3. Step 3: Cross multiply
    39,355.76x = 54,310.99 × 21,450.78
  4. Step 4: Simplify right side
    39,355.76x = 1,165,013,098.07
  5. Step 5: Solve for x
    x = 1,165,013,098.07/39,355.76
  6. Step 6: Final answer
    x = 29,602.10

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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.