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Finding the Fourth Proportional to 28,424.52, 42,636.88 and 8,703

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Solution

The fourth proportional to 28,424.52, 42,636.88 and 8,703 is: 13,054.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,424.52 : 42,636.88 = 8,703 : x
  2. Step 2: Convert to fraction form
    28,424.52/42,636.88 = 8,703/x
  3. Step 3: Cross multiply
    28,424.52x = 42,636.88 × 8,703
  4. Step 4: Simplify right side
    28,424.52x = 371,068,766.64
  5. Step 5: Solve for x
    x = 371,068,766.64/28,424.52
  6. Step 6: Final answer
    x = 13,054.53

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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.