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Finding the Fourth Proportional to 12,390.59, 18,591.95 and 6,151.19

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Solution

The fourth proportional to 12,390.59, 18,591.95 and 6,151.19 is: 9,229.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.59 : 18,591.95 = 6,151.19 : x
  2. Step 2: Convert to fraction form
    12,390.59/18,591.95 = 6,151.19/x
  3. Step 3: Cross multiply
    12,390.59x = 18,591.95 × 6,151.19
  4. Step 4: Simplify right side
    12,390.59x = 114,362,616.92
  5. Step 5: Solve for x
    x = 114,362,616.92/12,390.59
  6. Step 6: Final answer
    x = 9,229.80

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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.