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Finding the Fourth Proportional to 28,482.96, 42,729.30 and 8,761.08

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Solution

The fourth proportional to 28,482.96, 42,729.30 and 8,761.08 is: 13,143.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,482.96 : 42,729.30 = 8,761.08 : x
  2. Step 2: Convert to fraction form
    28,482.96/42,729.30 = 8,761.08/x
  3. Step 3: Cross multiply
    28,482.96x = 42,729.30 × 8,761.08
  4. Step 4: Simplify right side
    28,482.96x = 374,354,815.64
  5. Step 5: Solve for x
    x = 374,354,815.64/28,482.96
  6. Step 6: Final answer
    x = 13,143.11

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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.