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Finding the Fourth Proportional to 8,643.20, 11,926.89 and 4,865.15

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Solution

The fourth proportional to 8,643.20, 11,926.89 and 4,865.15 is: 6,713.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.20 : 11,926.89 = 4,865.15 : x
  2. Step 2: Convert to fraction form
    8,643.20/11,926.89 = 4,865.15/x
  3. Step 3: Cross multiply
    8,643.20x = 11,926.89 × 4,865.15
  4. Step 4: Simplify right side
    8,643.20x = 58,026,049.25
  5. Step 5: Solve for x
    x = 58,026,049.25/8,643.20
  6. Step 6: Final answer
    x = 6,713.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.