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Finding the Fourth Proportional to 18,705.91, 28,062.29 and 11,301.55

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Solution

The fourth proportional to 18,705.91, 28,062.29 and 11,301.55 is: 16,954.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.91 : 28,062.29 = 11,301.55 : x
  2. Step 2: Convert to fraction form
    18,705.91/28,062.29 = 11,301.55/x
  3. Step 3: Cross multiply
    18,705.91x = 28,062.29 × 11,301.55
  4. Step 4: Simplify right side
    18,705.91x = 317,147,331.11
  5. Step 5: Solve for x
    x = 317,147,331.11/18,705.91
  6. Step 6: Final answer
    x = 16,954.39

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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.