Home / 13,686.05-18,869.97-11,254.92

Finding the Fourth Proportional to 13,686.05, 18,869.97 and 11,254.92

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Solution

The fourth proportional to 13,686.05, 18,869.97 and 11,254.92 is: 15,517.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.05 : 18,869.97 = 11,254.92 : x
  2. Step 2: Convert to fraction form
    13,686.05/18,869.97 = 11,254.92/x
  3. Step 3: Cross multiply
    13,686.05x = 18,869.97 × 11,254.92
  4. Step 4: Simplify right side
    13,686.05x = 212,380,002.75
  5. Step 5: Solve for x
    x = 212,380,002.75/13,686.05
  6. Step 6: Final answer
    x = 15,517.99

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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.