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Finding the Fourth Proportional to 12,342.76, 18,520.23 and 5,769.40

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Solution

The fourth proportional to 12,342.76, 18,520.23 and 5,769.40 is: 8,656.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,342.76 : 18,520.23 = 5,769.40 : x
  2. Step 2: Convert to fraction form
    12,342.76/18,520.23 = 5,769.40/x
  3. Step 3: Cross multiply
    12,342.76x = 18,520.23 × 5,769.40
  4. Step 4: Simplify right side
    12,342.76x = 106,850,614.96
  5. Step 5: Solve for x
    x = 106,850,614.96/12,342.76
  6. Step 6: Final answer
    x = 8,656.95

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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.