Home / 39,355.68-54,311.16-21,450.78

Finding the Fourth Proportional to 39,355.68, 54,311.16 and 21,450.78

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Solution

The fourth proportional to 39,355.68, 54,311.16 and 21,450.78 is: 29,602.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,355.68 : 54,311.16 = 21,450.78 : x
  2. Step 2: Convert to fraction form
    39,355.68/54,311.16 = 21,450.78/x
  3. Step 3: Cross multiply
    39,355.68x = 54,311.16 × 21,450.78
  4. Step 4: Simplify right side
    39,355.68x = 1,165,016,744.70
  5. Step 5: Solve for x
    x = 1,165,016,744.70/39,355.68
  6. Step 6: Final answer
    x = 29,602.25

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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.