Home / 39,291.59-54,223.61-21,387.80

Finding the Fourth Proportional to 39,291.59, 54,223.61 and 21,387.80

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Solution

The fourth proportional to 39,291.59, 54,223.61 and 21,387.80 is: 29,515.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,291.59 : 54,223.61 = 21,387.80 : x
  2. Step 2: Convert to fraction form
    39,291.59/54,223.61 = 21,387.80/x
  3. Step 3: Cross multiply
    39,291.59x = 54,223.61 × 21,387.80
  4. Step 4: Simplify right side
    39,291.59x = 1,159,723,725.96
  5. Step 5: Solve for x
    x = 1,159,723,725.96/39,291.59
  6. Step 6: Final answer
    x = 29,515.83

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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.