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Finding the Fourth Proportional to 15,191.64, 20,955.42 and 11,223

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Solution

The fourth proportional to 15,191.64, 20,955.42 and 11,223 is: 15,481.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.64 : 20,955.42 = 11,223 : x
  2. Step 2: Convert to fraction form
    15,191.64/20,955.42 = 11,223/x
  3. Step 3: Cross multiply
    15,191.64x = 20,955.42 × 11,223
  4. Step 4: Simplify right side
    15,191.64x = 235,182,678.66
  5. Step 5: Solve for x
    x = 235,182,678.66/15,191.64
  6. Step 6: Final answer
    x = 15,481.06

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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.