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Finding the Fourth Proportional to 28,492.61, 42,743.78 and 8,770.73

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Solution

The fourth proportional to 28,492.61, 42,743.78 and 8,770.73 is: 13,157.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,492.61 : 42,743.78 = 8,770.73 : x
  2. Step 2: Convert to fraction form
    28,492.61/42,743.78 = 8,770.73/x
  3. Step 3: Cross multiply
    28,492.61x = 42,743.78 × 8,770.73
  4. Step 4: Simplify right side
    28,492.61x = 374,894,153.56
  5. Step 5: Solve for x
    x = 374,894,153.56/28,492.61
  6. Step 6: Final answer
    x = 13,157.59

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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.