Home / 20,500.38-28,291.86-15,455.70

Finding the Fourth Proportional to 20,500.38, 28,291.86 and 15,455.70

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Solution

The fourth proportional to 20,500.38, 28,291.86 and 15,455.70 is: 21,329.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.38 : 28,291.86 = 15,455.70 : x
  2. Step 2: Convert to fraction form
    20,500.38/28,291.86 = 15,455.70/x
  3. Step 3: Cross multiply
    20,500.38x = 28,291.86 × 15,455.70
  4. Step 4: Simplify right side
    20,500.38x = 437,270,500.60
  5. Step 5: Solve for x
    x = 437,270,500.60/20,500.38
  6. Step 6: Final answer
    x = 21,329.87

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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.