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Finding the Fourth Proportional to 18,888.72, 26,067.12 and 10,391.50

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Solution

The fourth proportional to 18,888.72, 26,067.12 and 10,391.50 is: 14,340.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.72 : 26,067.12 = 10,391.50 : x
  2. Step 2: Convert to fraction form
    18,888.72/26,067.12 = 10,391.50/x
  3. Step 3: Cross multiply
    18,888.72x = 26,067.12 × 10,391.50
  4. Step 4: Simplify right side
    18,888.72x = 270,876,295.19
  5. Step 5: Solve for x
    x = 270,876,295.19/18,888.72
  6. Step 6: Final answer
    x = 14,340.64

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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.