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Finding the Fourth Proportional to 32,702.72, 45,129.30 and 20,127.20

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Solution

The fourth proportional to 32,702.72, 45,129.30 and 20,127.20 is: 27,775.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,702.72 : 45,129.30 = 20,127.20 : x
  2. Step 2: Convert to fraction form
    32,702.72/45,129.30 = 20,127.20/x
  3. Step 3: Cross multiply
    32,702.72x = 45,129.30 × 20,127.20
  4. Step 4: Simplify right side
    32,702.72x = 908,326,446.96
  5. Step 5: Solve for x
    x = 908,326,446.96/32,702.72
  6. Step 6: Final answer
    x = 27,775.26

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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.