Home / 20,686.43-31,037.15-10,155.33

Finding the Fourth Proportional to 20,686.43, 31,037.15 and 10,155.33

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Solution

The fourth proportional to 20,686.43, 31,037.15 and 10,155.33 is: 15,236.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.43 : 31,037.15 = 10,155.33 : x
  2. Step 2: Convert to fraction form
    20,686.43/31,037.15 = 10,155.33/x
  3. Step 3: Cross multiply
    20,686.43x = 31,037.15 × 10,155.33
  4. Step 4: Simplify right side
    20,686.43x = 315,192,449.73
  5. Step 5: Solve for x
    x = 315,192,449.73/20,686.43
  6. Step 6: Final answer
    x = 15,236.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.