Home / 39,290.72-54,221.24-21,385.70

Finding the Fourth Proportional to 39,290.72, 54,221.24 and 21,385.70

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Solution

The fourth proportional to 39,290.72, 54,221.24 and 21,385.70 is: 29,512.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,290.72 : 54,221.24 = 21,385.70 : x
  2. Step 2: Convert to fraction form
    39,290.72/54,221.24 = 21,385.70/x
  3. Step 3: Cross multiply
    39,290.72x = 54,221.24 × 21,385.70
  4. Step 4: Simplify right side
    39,290.72x = 1,159,559,172.27
  5. Step 5: Solve for x
    x = 1,159,559,172.27/39,290.72
  6. Step 6: Final answer
    x = 29,512.29

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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.