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Finding the Fourth Proportional to 12,521.68, 18,766.24 and 5,117.68

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Solution

The fourth proportional to 12,521.68, 18,766.24 and 5,117.68 is: 7,669.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,521.68 : 18,766.24 = 5,117.68 : x
  2. Step 2: Convert to fraction form
    12,521.68/18,766.24 = 5,117.68/x
  3. Step 3: Cross multiply
    12,521.68x = 18,766.24 × 5,117.68
  4. Step 4: Simplify right side
    12,521.68x = 96,039,611.12
  5. Step 5: Solve for x
    x = 96,039,611.12/12,521.68
  6. Step 6: Final answer
    x = 7,669.87

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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.