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Finding the Fourth Proportional to 11,145.28, 15,375.54 and 7,164.88

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Solution

The fourth proportional to 11,145.28, 15,375.54 and 7,164.88 is: 9,884.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,145.28 : 15,375.54 = 7,164.88 : x
  2. Step 2: Convert to fraction form
    11,145.28/15,375.54 = 7,164.88/x
  3. Step 3: Cross multiply
    11,145.28x = 15,375.54 × 7,164.88
  4. Step 4: Simplify right side
    11,145.28x = 110,163,899.04
  5. Step 5: Solve for x
    x = 110,163,899.04/11,145.28
  6. Step 6: Final answer
    x = 9,884.35

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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.