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Finding the Fourth Proportional to 12,615.74, 18,914.90 and 5,591.92

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Solution

The fourth proportional to 12,615.74, 18,914.90 and 5,591.92 is: 8,384.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.74 : 18,914.90 = 5,591.92 : x
  2. Step 2: Convert to fraction form
    12,615.74/18,914.90 = 5,591.92/x
  3. Step 3: Cross multiply
    12,615.74x = 18,914.90 × 5,591.92
  4. Step 4: Simplify right side
    12,615.74x = 105,770,607.61
  5. Step 5: Solve for x
    x = 105,770,607.61/12,615.74
  6. Step 6: Final answer
    x = 8,384.02

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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.