Home / 47,905.11-66,109.16-28,785.20

Finding the Fourth Proportional to 47,905.11, 66,109.16 and 28,785.20

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Solution

The fourth proportional to 47,905.11, 66,109.16 and 28,785.20 is: 39,723.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,905.11 : 66,109.16 = 28,785.20 : x
  2. Step 2: Convert to fraction form
    47,905.11/66,109.16 = 28,785.20/x
  3. Step 3: Cross multiply
    47,905.11x = 66,109.16 × 28,785.20
  4. Step 4: Simplify right side
    47,905.11x = 1,902,965,414.53
  5. Step 5: Solve for x
    x = 1,902,965,414.53/47,905.11
  6. Step 6: Final answer
    x = 39,723.65

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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.