Home / 20,350.91-28,087.61-11,400.62

Finding the Fourth Proportional to 20,350.91, 28,087.61 and 11,400.62

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Solution

The fourth proportional to 20,350.91, 28,087.61 and 11,400.62 is: 15,734.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.91 : 28,087.61 = 11,400.62 : x
  2. Step 2: Convert to fraction form
    20,350.91/28,087.61 = 11,400.62/x
  3. Step 3: Cross multiply
    20,350.91x = 28,087.61 × 11,400.62
  4. Step 4: Simplify right side
    20,350.91x = 320,215,970.88
  5. Step 5: Solve for x
    x = 320,215,970.88/20,350.91
  6. Step 6: Final answer
    x = 15,734.72

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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.