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Finding the Fourth Proportional to 19,115.10, 28,672.65 and 18,251.10

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Solution

The fourth proportional to 19,115.10, 28,672.65 and 18,251.10 is: 27,376.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,115.10 : 28,672.65 = 18,251.10 : x
  2. Step 2: Convert to fraction form
    19,115.10/28,672.65 = 18,251.10/x
  3. Step 3: Cross multiply
    19,115.10x = 28,672.65 × 18,251.10
  4. Step 4: Simplify right side
    19,115.10x = 523,307,402.42
  5. Step 5: Solve for x
    x = 523,307,402.42/19,115.10
  6. Step 6: Final answer
    x = 27,376.65

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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.