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Finding the Fourth Proportional to 8,571.52, 12,865.20 and 5,291.02

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Solution

The fourth proportional to 8,571.52, 12,865.20 and 5,291.02 is: 7,941.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,571.52 : 12,865.20 = 5,291.02 : x
  2. Step 2: Convert to fraction form
    8,571.52/12,865.20 = 5,291.02/x
  3. Step 3: Cross multiply
    8,571.52x = 12,865.20 × 5,291.02
  4. Step 4: Simplify right side
    8,571.52x = 68,070,030.50
  5. Step 5: Solve for x
    x = 68,070,030.50/8,571.52
  6. Step 6: Final answer
    x = 7,941.42

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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.