Home / 13,517.88-18,667.51-12,781.59

Finding the Fourth Proportional to 13,517.88, 18,667.51 and 12,781.59

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Solution

The fourth proportional to 13,517.88, 18,667.51 and 12,781.59 is: 17,650.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.88 : 18,667.51 = 12,781.59 : x
  2. Step 2: Convert to fraction form
    13,517.88/18,667.51 = 12,781.59/x
  3. Step 3: Cross multiply
    13,517.88x = 18,667.51 × 12,781.59
  4. Step 4: Simplify right side
    13,517.88x = 238,600,459.14
  5. Step 5: Solve for x
    x = 238,600,459.14/13,517.88
  6. Step 6: Final answer
    x = 17,650.73

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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.