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Finding the Fourth Proportional to 25,799.52, 38,699.28 and 20,638.20

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Solution

The fourth proportional to 25,799.52, 38,699.28 and 20,638.20 is: 30,957.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,799.52 : 38,699.28 = 20,638.20 : x
  2. Step 2: Convert to fraction form
    25,799.52/38,699.28 = 20,638.20/x
  3. Step 3: Cross multiply
    25,799.52x = 38,699.28 × 20,638.20
  4. Step 4: Simplify right side
    25,799.52x = 798,683,480.50
  5. Step 5: Solve for x
    x = 798,683,480.50/25,799.52
  6. Step 6: Final answer
    x = 30,957.30

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Similar ratio
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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.