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Finding the Fourth Proportional to 31,593.68, 47,393.26 and 8,220.12

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Solution

The fourth proportional to 31,593.68, 47,393.26 and 8,220.12 is: 12,330.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,593.68 : 47,393.26 = 8,220.12 : x
  2. Step 2: Convert to fraction form
    31,593.68/47,393.26 = 8,220.12/x
  3. Step 3: Cross multiply
    31,593.68x = 47,393.26 × 8,220.12
  4. Step 4: Simplify right side
    31,593.68x = 389,578,284.39
  5. Step 5: Solve for x
    x = 389,578,284.39/31,593.68
  6. Step 6: Final answer
    x = 12,330.89

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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.