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Finding the Fourth Proportional to 8,474.58, 12,712.43 and 2,928.46

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Solution

The fourth proportional to 8,474.58, 12,712.43 and 2,928.46 is: 4,392.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,474.58 : 12,712.43 = 2,928.46 : x
  2. Step 2: Convert to fraction form
    8,474.58/12,712.43 = 2,928.46/x
  3. Step 3: Cross multiply
    8,474.58x = 12,712.43 × 2,928.46
  4. Step 4: Simplify right side
    8,474.58x = 37,227,842.76
  5. Step 5: Solve for x
    x = 37,227,842.76/8,474.58
  6. Step 6: Final answer
    x = 4,392.88

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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.