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Finding the Fourth Proportional to 12,257.68, 18,395.76 and 8,979.16

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Solution

The fourth proportional to 12,257.68, 18,395.76 and 8,979.16 is: 13,475.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,257.68 : 18,395.76 = 8,979.16 : x
  2. Step 2: Convert to fraction form
    12,257.68/18,395.76 = 8,979.16/x
  3. Step 3: Cross multiply
    12,257.68x = 18,395.76 × 8,979.16
  4. Step 4: Simplify right side
    12,257.68x = 165,178,472.36
  5. Step 5: Solve for x
    x = 165,178,472.36/12,257.68
  6. Step 6: Final answer
    x = 13,475.51

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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.