Home / 20,400.46-28,150.98-11,446.72

Finding the Fourth Proportional to 20,400.46, 28,150.98 and 11,446.72

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Solution

The fourth proportional to 20,400.46, 28,150.98 and 11,446.72 is: 15,795.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.46 : 28,150.98 = 11,446.72 : x
  2. Step 2: Convert to fraction form
    20,400.46/28,150.98 = 11,446.72/x
  3. Step 3: Cross multiply
    20,400.46x = 28,150.98 × 11,446.72
  4. Step 4: Simplify right side
    20,400.46x = 322,236,385.79
  5. Step 5: Solve for x
    x = 322,236,385.79/20,400.46
  6. Step 6: Final answer
    x = 15,795.55

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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.