Home / 13,686.30-20,517.30-4,918.86

Finding the Fourth Proportional to 13,686.30, 20,517.30 and 4,918.86

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Solution

The fourth proportional to 13,686.30, 20,517.30 and 4,918.86 is: 7,373.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.30 : 20,517.30 = 4,918.86 : x
  2. Step 2: Convert to fraction form
    13,686.30/20,517.30 = 4,918.86/x
  3. Step 3: Cross multiply
    13,686.30x = 20,517.30 × 4,918.86
  4. Step 4: Simplify right side
    13,686.30x = 100,921,726.28
  5. Step 5: Solve for x
    x = 100,921,726.28/13,686.30
  6. Step 6: Final answer
    x = 7,373.92

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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.