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Finding the Fourth Proportional to 18,128.66, 27,191.88 and 10,779.88

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Solution

The fourth proportional to 18,128.66, 27,191.88 and 10,779.88 is: 16,169.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.66 : 27,191.88 = 10,779.88 : x
  2. Step 2: Convert to fraction form
    18,128.66/27,191.88 = 10,779.88/x
  3. Step 3: Cross multiply
    18,128.66x = 27,191.88 × 10,779.88
  4. Step 4: Simplify right side
    18,128.66x = 293,125,067.42
  5. Step 5: Solve for x
    x = 293,125,067.42/18,128.66
  6. Step 6: Final answer
    x = 16,169.16

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1.5x scale

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.