Home / 13,909.83-20,850.17-5,139.15

Finding the Fourth Proportional to 13,909.83, 20,850.17 and 5,139.15

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Solution

The fourth proportional to 13,909.83, 20,850.17 and 5,139.15 is: 7,703.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.83 : 20,850.17 = 5,139.15 : x
  2. Step 2: Convert to fraction form
    13,909.83/20,850.17 = 5,139.15/x
  3. Step 3: Cross multiply
    13,909.83x = 20,850.17 × 5,139.15
  4. Step 4: Simplify right side
    13,909.83x = 107,152,125.46
  5. Step 5: Solve for x
    x = 107,152,125.46/13,909.83
  6. Step 6: Final answer
    x = 7,703.34

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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.