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Finding the Fourth Proportional to 9,912.80, 14,856.60 and 4,062.80

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Solution

The fourth proportional to 9,912.80, 14,856.60 and 4,062.80 is: 6,089.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,912.80 : 14,856.60 = 4,062.80 : x
  2. Step 2: Convert to fraction form
    9,912.80/14,856.60 = 4,062.80/x
  3. Step 3: Cross multiply
    9,912.80x = 14,856.60 × 4,062.80
  4. Step 4: Simplify right side
    9,912.80x = 60,359,394.48
  5. Step 5: Solve for x
    x = 60,359,394.48/9,912.80
  6. Step 6: Final answer
    x = 6,089.04

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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.