Home / 13,517.42-18,666.86-12,781.12

Finding the Fourth Proportional to 13,517.42, 18,666.86 and 12,781.12

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Solution

The fourth proportional to 13,517.42, 18,666.86 and 12,781.12 is: 17,650.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.42 : 18,666.86 = 12,781.12 : x
  2. Step 2: Convert to fraction form
    13,517.42/18,666.86 = 12,781.12/x
  3. Step 3: Cross multiply
    13,517.42x = 18,666.86 × 12,781.12
  4. Step 4: Simplify right side
    13,517.42x = 238,583,377.68
  5. Step 5: Solve for x
    x = 238,583,377.68/13,517.42
  6. Step 6: Final answer
    x = 17,650.07

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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.