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Finding the Fourth Proportional to 19,305.72, 28,926.78 and 17,691.72

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Solution

The fourth proportional to 19,305.72, 28,926.78 and 17,691.72 is: 26,508.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,305.72 : 28,926.78 = 17,691.72 : x
  2. Step 2: Convert to fraction form
    19,305.72/28,926.78 = 17,691.72/x
  3. Step 3: Cross multiply
    19,305.72x = 28,926.78 × 17,691.72
  4. Step 4: Simplify right side
    19,305.72x = 511,764,492.26
  5. Step 5: Solve for x
    x = 511,764,492.26/19,305.72
  6. Step 6: Final answer
    x = 26,508.44

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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.