Home / 28,140.12-42,177.24-11,489.76

Finding the Fourth Proportional to 28,140.12, 42,177.24 and 11,489.76

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Solution

The fourth proportional to 28,140.12, 42,177.24 and 11,489.76 is: 17,221.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,140.12 : 42,177.24 = 11,489.76 : x
  2. Step 2: Convert to fraction form
    28,140.12/42,177.24 = 11,489.76/x
  3. Step 3: Cross multiply
    28,140.12x = 42,177.24 × 11,489.76
  4. Step 4: Simplify right side
    28,140.12x = 484,606,365.06
  5. Step 5: Solve for x
    x = 484,606,365.06/28,140.12
  6. Step 6: Final answer
    x = 17,221.19

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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.