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Finding the Fourth Proportional to 8,447.79, 11,656.17 and 4,909.17

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Solution

The fourth proportional to 8,447.79, 11,656.17 and 4,909.17 is: 6,773.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,447.79 : 11,656.17 = 4,909.17 : x
  2. Step 2: Convert to fraction form
    8,447.79/11,656.17 = 4,909.17/x
  3. Step 3: Cross multiply
    8,447.79x = 11,656.17 × 4,909.17
  4. Step 4: Simplify right side
    8,447.79x = 57,222,120.08
  5. Step 5: Solve for x
    x = 57,222,120.08/8,447.79
  6. Step 6: Final answer
    x = 6,773.62

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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.