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Finding the Fourth Proportional to 38,472.64, 57,708.64 and 21,840.32

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Solution

The fourth proportional to 38,472.64, 57,708.64 and 21,840.32 is: 32,760.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,472.64 : 57,708.64 = 21,840.32 : x
  2. Step 2: Convert to fraction form
    38,472.64/57,708.64 = 21,840.32/x
  3. Step 3: Cross multiply
    38,472.64x = 57,708.64 × 21,840.32
  4. Step 4: Simplify right side
    38,472.64x = 1,260,375,164.36
  5. Step 5: Solve for x
    x = 1,260,375,164.36/38,472.64
  6. Step 6: Final answer
    x = 32,760.30

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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.