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Finding the Fourth Proportional to 8,912.70, 13,368.65 and 4,229.28

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Solution

The fourth proportional to 8,912.70, 13,368.65 and 4,229.28 is: 6,343.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912.70 : 13,368.65 = 4,229.28 : x
  2. Step 2: Convert to fraction form
    8,912.70/13,368.65 = 4,229.28/x
  3. Step 3: Cross multiply
    8,912.70x = 13,368.65 × 4,229.28
  4. Step 4: Simplify right side
    8,912.70x = 56,539,742.93
  5. Step 5: Solve for x
    x = 56,539,742.93/8,912.70
  6. Step 6: Final answer
    x = 6,343.73

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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.