Home / 20,139.87-27,793.04-11,187.39

Finding the Fourth Proportional to 20,139.87, 27,793.04 and 11,187.39

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Solution

The fourth proportional to 20,139.87, 27,793.04 and 11,187.39 is: 15,438.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.87 : 27,793.04 = 11,187.39 : x
  2. Step 2: Convert to fraction form
    20,139.87/27,793.04 = 11,187.39/x
  3. Step 3: Cross multiply
    20,139.87x = 27,793.04 × 11,187.39
  4. Step 4: Simplify right side
    20,139.87x = 310,931,577.77
  5. Step 5: Solve for x
    x = 310,931,577.77/20,139.87
  6. Step 6: Final answer
    x = 15,438.61

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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.