Home / 39,215.33-54,117.11-21,310.30

Finding the Fourth Proportional to 39,215.33, 54,117.11 and 21,310.30

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Solution

The fourth proportional to 39,215.33, 54,117.11 and 21,310.30 is: 29,408.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,215.33 : 54,117.11 = 21,310.30 : x
  2. Step 2: Convert to fraction form
    39,215.33/54,117.11 = 21,310.30/x
  3. Step 3: Cross multiply
    39,215.33x = 54,117.11 × 21,310.30
  4. Step 4: Simplify right side
    39,215.33x = 1,153,251,665.75
  5. Step 5: Solve for x
    x = 1,153,251,665.75/39,215.33
  6. Step 6: Final answer
    x = 29,408.19

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Half scale
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Double scale
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Similar ratio
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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.