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Finding the Fourth Proportional to 38,642.64, 57,963.98 and 21,102.88

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Solution

The fourth proportional to 38,642.64, 57,963.98 and 21,102.88 is: 31,654.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,642.64 : 57,963.98 = 21,102.88 : x
  2. Step 2: Convert to fraction form
    38,642.64/57,963.98 = 21,102.88/x
  3. Step 3: Cross multiply
    38,642.64x = 57,963.98 × 21,102.88
  4. Step 4: Simplify right side
    38,642.64x = 1,223,206,914.26
  5. Step 5: Solve for x
    x = 1,223,206,914.26/38,642.64
  6. Step 6: Final answer
    x = 31,654.33

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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.