Home / 39,290.22-54,220.32-21,385.35

Finding the Fourth Proportional to 39,290.22, 54,220.32 and 21,385.35

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Solution

The fourth proportional to 39,290.22, 54,220.32 and 21,385.35 is: 29,511.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,290.22 : 54,220.32 = 21,385.35 : x
  2. Step 2: Convert to fraction form
    39,290.22/54,220.32 = 21,385.35/x
  3. Step 3: Cross multiply
    39,290.22x = 54,220.32 × 21,385.35
  4. Step 4: Simplify right side
    39,290.22x = 1,159,520,520.31
  5. Step 5: Solve for x
    x = 1,159,520,520.31/39,290.22
  6. Step 6: Final answer
    x = 29,511.68

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Double scale
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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.