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Finding the Fourth Proportional to 12,591.57, 18,861.39 and 7,384.89

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Solution

The fourth proportional to 12,591.57, 18,861.39 and 7,384.89 is: 11,062.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.57 : 18,861.39 = 7,384.89 : x
  2. Step 2: Convert to fraction form
    12,591.57/18,861.39 = 7,384.89/x
  3. Step 3: Cross multiply
    12,591.57x = 18,861.39 × 7,384.89
  4. Step 4: Simplify right side
    12,591.57x = 139,289,290.40
  5. Step 5: Solve for x
    x = 139,289,290.40/12,591.57
  6. Step 6: Final answer
    x = 11,062.11

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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.