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Finding the Fourth Proportional to 12,523.40, 18,785.10 and 10,475.40

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Solution

The fourth proportional to 12,523.40, 18,785.10 and 10,475.40 is: 15,713.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,523.40 : 18,785.10 = 10,475.40 : x
  2. Step 2: Convert to fraction form
    12,523.40/18,785.10 = 10,475.40/x
  3. Step 3: Cross multiply
    12,523.40x = 18,785.10 × 10,475.40
  4. Step 4: Simplify right side
    12,523.40x = 196,781,436.54
  5. Step 5: Solve for x
    x = 196,781,436.54/12,523.40
  6. Step 6: Final answer
    x = 15,713.10

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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.