Home / 39,385.91-54,353.16-21,480.86

Finding the Fourth Proportional to 39,385.91, 54,353.16 and 21,480.86

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Solution

The fourth proportional to 39,385.91, 54,353.16 and 21,480.86 is: 29,643.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,385.91 : 54,353.16 = 21,480.86 : x
  2. Step 2: Convert to fraction form
    39,385.91/54,353.16 = 21,480.86/x
  3. Step 3: Cross multiply
    39,385.91x = 54,353.16 × 21,480.86
  4. Step 4: Simplify right side
    39,385.91x = 1,167,552,756.40
  5. Step 5: Solve for x
    x = 1,167,552,756.40/39,385.91
  6. Step 6: Final answer
    x = 29,643.92

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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.