Home / 20,319.68-28,039.56-11,366.48

Finding the Fourth Proportional to 20,319.68, 28,039.56 and 11,366.48

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Solution

The fourth proportional to 20,319.68, 28,039.56 and 11,366.48 is: 15,684.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.68 : 28,039.56 = 11,366.48 : x
  2. Step 2: Convert to fraction form
    20,319.68/28,039.56 = 11,366.48/x
  3. Step 3: Cross multiply
    20,319.68x = 28,039.56 × 11,366.48
  4. Step 4: Simplify right side
    20,319.68x = 318,711,097.95
  5. Step 5: Solve for x
    x = 318,711,097.95/20,319.68
  6. Step 6: Final answer
    x = 15,684.85

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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.