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Finding the Fourth Proportional to 18,995.52, 28,454.40 and 11,180.64

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Solution

The fourth proportional to 18,995.52, 28,454.40 and 11,180.64 is: 16,748.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.52 : 28,454.40 = 11,180.64 : x
  2. Step 2: Convert to fraction form
    18,995.52/28,454.40 = 11,180.64/x
  3. Step 3: Cross multiply
    18,995.52x = 28,454.40 × 11,180.64
  4. Step 4: Simplify right side
    18,995.52x = 318,138,402.82
  5. Step 5: Solve for x
    x = 318,138,402.82/18,995.52
  6. Step 6: Final answer
    x = 16,748.08

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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.