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Finding the Fourth Proportional to 18,710.63, 28,063.67 and 11,691.27

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Solution

The fourth proportional to 18,710.63, 28,063.67 and 11,691.27 is: 17,535.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.63 : 28,063.67 = 11,691.27 : x
  2. Step 2: Convert to fraction form
    18,710.63/28,063.67 = 11,691.27/x
  3. Step 3: Cross multiply
    18,710.63x = 28,063.67 × 11,691.27
  4. Step 4: Simplify right side
    18,710.63x = 328,099,943.16
  5. Step 5: Solve for x
    x = 328,099,943.16/18,710.63
  6. Step 6: Final answer
    x = 17,535.48

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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.