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Finding the Fourth Proportional to 38,507.88, 57,724.22 and 18,785.64

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Solution

The fourth proportional to 38,507.88, 57,724.22 and 18,785.64 is: 28,160.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,507.88 : 57,724.22 = 18,785.64 : x
  2. Step 2: Convert to fraction form
    38,507.88/57,724.22 = 18,785.64/x
  3. Step 3: Cross multiply
    38,507.88x = 57,724.22 × 18,785.64
  4. Step 4: Simplify right side
    38,507.88x = 1,084,386,416.20
  5. Step 5: Solve for x
    x = 1,084,386,416.20/38,507.88
  6. Step 6: Final answer
    x = 28,160.12

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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.