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Finding the Fourth Proportional to 21,702.80, 32,539.60 and 8,548.40

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Solution

The fourth proportional to 21,702.80, 32,539.60 and 8,548.40 is: 12,816.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,702.80 : 32,539.60 = 8,548.40 : x
  2. Step 2: Convert to fraction form
    21,702.80/32,539.60 = 8,548.40/x
  3. Step 3: Cross multiply
    21,702.80x = 32,539.60 × 8,548.40
  4. Step 4: Simplify right side
    21,702.80x = 278,161,516.64
  5. Step 5: Solve for x
    x = 278,161,516.64/21,702.80
  6. Step 6: Final answer
    x = 12,816.85

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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.