Home / 12,618.27-17,407.53-7,311.78

Finding the Fourth Proportional to 12,618.27, 17,407.53 and 7,311.78

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Solution

The fourth proportional to 12,618.27, 17,407.53 and 7,311.78 is: 10,086.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.27 : 17,407.53 = 7,311.78 : x
  2. Step 2: Convert to fraction form
    12,618.27/17,407.53 = 7,311.78/x
  3. Step 3: Cross multiply
    12,618.27x = 17,407.53 × 7,311.78
  4. Step 4: Simplify right side
    12,618.27x = 127,280,029.70
  5. Step 5: Solve for x
    x = 127,280,029.70/12,618.27
  6. Step 6: Final answer
    x = 10,086.96

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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.