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Finding the Fourth Proportional to 38,639.52, 53,321.52 and 22,720.32

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Solution

The fourth proportional to 38,639.52, 53,321.52 and 22,720.32 is: 31,353.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,639.52 : 53,321.52 = 22,720.32 : x
  2. Step 2: Convert to fraction form
    38,639.52/53,321.52 = 22,720.32/x
  3. Step 3: Cross multiply
    38,639.52x = 53,321.52 × 22,720.32
  4. Step 4: Simplify right side
    38,639.52x = 1,211,481,997.29
  5. Step 5: Solve for x
    x = 1,211,481,997.29/38,639.52
  6. Step 6: Final answer
    x = 31,353.44

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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.