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Finding the Fourth Proportional to 9,986.80, 14,960.40 and 8,755.60

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Solution

The fourth proportional to 9,986.80, 14,960.40 and 8,755.60 is: 13,116.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,986.80 : 14,960.40 = 8,755.60 : x
  2. Step 2: Convert to fraction form
    9,986.80/14,960.40 = 8,755.60/x
  3. Step 3: Cross multiply
    9,986.80x = 14,960.40 × 8,755.60
  4. Step 4: Simplify right side
    9,986.80x = 130,987,278.24
  5. Step 5: Solve for x
    x = 130,987,278.24/9,986.80
  6. Step 6: Final answer
    x = 13,116.04

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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.