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Finding the Fourth Proportional to 8,114.50, 12,171.75 and 2,642.50

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Solution

The fourth proportional to 8,114.50, 12,171.75 and 2,642.50 is: 3,963.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,114.50 : 12,171.75 = 2,642.50 : x
  2. Step 2: Convert to fraction form
    8,114.50/12,171.75 = 2,642.50/x
  3. Step 3: Cross multiply
    8,114.50x = 12,171.75 × 2,642.50
  4. Step 4: Simplify right side
    8,114.50x = 32,163,849.38
  5. Step 5: Solve for x
    x = 32,163,849.38/8,114.50
  6. Step 6: Final answer
    x = 3,963.75

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1.5x scale

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.