Home / 20,428.07-28,190.85-11,475.95

Finding the Fourth Proportional to 20,428.07, 28,190.85 and 11,475.95

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Solution

The fourth proportional to 20,428.07, 28,190.85 and 11,475.95 is: 15,836.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.07 : 28,190.85 = 11,475.95 : x
  2. Step 2: Convert to fraction form
    20,428.07/28,190.85 = 11,475.95/x
  3. Step 3: Cross multiply
    20,428.07x = 28,190.85 × 11,475.95
  4. Step 4: Simplify right side
    20,428.07x = 323,516,785.06
  5. Step 5: Solve for x
    x = 323,516,785.06/20,428.07
  6. Step 6: Final answer
    x = 15,836.87

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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.