Home / 39,289.55-54,220.72-21,385.71

Finding the Fourth Proportional to 39,289.55, 54,220.72 and 21,385.71

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Solution

The fourth proportional to 39,289.55, 54,220.72 and 21,385.71 is: 29,512.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,289.55 : 54,220.72 = 21,385.71 : x
  2. Step 2: Convert to fraction form
    39,289.55/54,220.72 = 21,385.71/x
  3. Step 3: Cross multiply
    39,289.55x = 54,220.72 × 21,385.71
  4. Step 4: Simplify right side
    39,289.55x = 1,159,548,593.91
  5. Step 5: Solve for x
    x = 1,159,548,593.91/39,289.55
  6. Step 6: Final answer
    x = 29,512.90

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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.