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Finding the Fourth Proportional to 10,988.88, 15,183.84 and 8,649.60

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Solution

The fourth proportional to 10,988.88, 15,183.84 and 8,649.60 is: 11,951.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,988.88 : 15,183.84 = 8,649.60 : x
  2. Step 2: Convert to fraction form
    10,988.88/15,183.84 = 8,649.60/x
  3. Step 3: Cross multiply
    10,988.88x = 15,183.84 × 8,649.60
  4. Step 4: Simplify right side
    10,988.88x = 131,334,142.46
  5. Step 5: Solve for x
    x = 131,334,142.46/10,988.88
  6. Step 6: Final answer
    x = 11,951.55

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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.