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Finding the Fourth Proportional to 10,995.76, 15,175.80 and 8,655.52

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Solution

The fourth proportional to 10,995.76, 15,175.80 and 8,655.52 is: 11,945.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,995.76 : 15,175.80 = 8,655.52 : x
  2. Step 2: Convert to fraction form
    10,995.76/15,175.80 = 8,655.52/x
  3. Step 3: Cross multiply
    10,995.76x = 15,175.80 × 8,655.52
  4. Step 4: Simplify right side
    10,995.76x = 131,354,440.42
  5. Step 5: Solve for x
    x = 131,354,440.42/10,995.76
  6. Step 6: Final answer
    x = 11,945.92

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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.