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Finding the Fourth Proportional to 8,642.60, 12,963.90 and 2,803.28

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Solution

The fourth proportional to 8,642.60, 12,963.90 and 2,803.28 is: 4,204.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.60 : 12,963.90 = 2,803.28 : x
  2. Step 2: Convert to fraction form
    8,642.60/12,963.90 = 2,803.28/x
  3. Step 3: Cross multiply
    8,642.60x = 12,963.90 × 2,803.28
  4. Step 4: Simplify right side
    8,642.60x = 36,341,441.59
  5. Step 5: Solve for x
    x = 36,341,441.59/8,642.60
  6. Step 6: Final answer
    x = 4,204.92

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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.