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Finding the Fourth Proportional to 12,423.64, 17,148 and 7,389.76

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Solution

The fourth proportional to 12,423.64, 17,148 and 7,389.76 is: 10,199.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,423.64 : 17,148 = 7,389.76 : x
  2. Step 2: Convert to fraction form
    12,423.64/17,148 = 7,389.76/x
  3. Step 3: Cross multiply
    12,423.64x = 17,148 × 7,389.76
  4. Step 4: Simplify right side
    12,423.64x = 126,719,604.48
  5. Step 5: Solve for x
    x = 126,719,604.48/12,423.64
  6. Step 6: Final answer
    x = 10,199.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.