Home / 20,555.09-28,366.12-11,123.66

Finding the Fourth Proportional to 20,555.09, 28,366.12 and 11,123.66

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Solution

The fourth proportional to 20,555.09, 28,366.12 and 11,123.66 is: 15,350.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.09 : 28,366.12 = 11,123.66 : x
  2. Step 2: Convert to fraction form
    20,555.09/28,366.12 = 11,123.66/x
  3. Step 3: Cross multiply
    20,555.09x = 28,366.12 × 11,123.66
  4. Step 4: Simplify right side
    20,555.09x = 315,534,876.95
  5. Step 5: Solve for x
    x = 315,534,876.95/20,555.09
  6. Step 6: Final answer
    x = 15,350.69

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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.