Home / 39,403.75-54,377.35-21,499.13

Finding the Fourth Proportional to 39,403.75, 54,377.35 and 21,499.13

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Solution

The fourth proportional to 39,403.75, 54,377.35 and 21,499.13 is: 29,668.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,403.75 : 54,377.35 = 21,499.13 : x
  2. Step 2: Convert to fraction form
    39,403.75/54,377.35 = 21,499.13/x
  3. Step 3: Cross multiply
    39,403.75x = 54,377.35 × 21,499.13
  4. Step 4: Simplify right side
    39,403.75x = 1,169,065,706.43
  5. Step 5: Solve for x
    x = 1,169,065,706.43/39,403.75
  6. Step 6: Final answer
    x = 29,668.90

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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.