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Finding the Fourth Proportional to 8,909.28, 13,368.72 and 4,292.28

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Solution

The fourth proportional to 8,909.28, 13,368.72 and 4,292.28 is: 6,440.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.28 : 13,368.72 = 4,292.28 : x
  2. Step 2: Convert to fraction form
    8,909.28/13,368.72 = 4,292.28/x
  3. Step 3: Cross multiply
    8,909.28x = 13,368.72 × 4,292.28
  4. Step 4: Simplify right side
    8,909.28x = 57,382,289.48
  5. Step 5: Solve for x
    x = 57,382,289.48/8,909.28
  6. Step 6: Final answer
    x = 6,440.73

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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.