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Finding the Fourth Proportional to 8,955.18, 12,370.59 and 8,517.78

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Solution

The fourth proportional to 8,955.18, 12,370.59 and 8,517.78 is: 11,766.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,955.18 : 12,370.59 = 8,517.78 : x
  2. Step 2: Convert to fraction form
    8,955.18/12,370.59 = 8,517.78/x
  3. Step 3: Cross multiply
    8,955.18x = 12,370.59 × 8,517.78
  4. Step 4: Simplify right side
    8,955.18x = 105,369,964.09
  5. Step 5: Solve for x
    x = 105,369,964.09/8,955.18
  6. Step 6: Final answer
    x = 11,766.37

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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.