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Finding the Fourth Proportional to 58,649.89, 87,974.85 and 21,209.13

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Solution

The fourth proportional to 58,649.89, 87,974.85 and 21,209.13 is: 31,813.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,649.89 : 87,974.85 = 21,209.13 : x
  2. Step 2: Convert to fraction form
    58,649.89/87,974.85 = 21,209.13/x
  3. Step 3: Cross multiply
    58,649.89x = 87,974.85 × 21,209.13
  4. Step 4: Simplify right side
    58,649.89x = 1,865,869,780.01
  5. Step 5: Solve for x
    x = 1,865,869,780.01/58,649.89
  6. Step 6: Final answer
    x = 31,813.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.