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Finding the Fourth Proportional to 10,505.04, 15,721.22 and 8,609.02

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Solution

The fourth proportional to 10,505.04, 15,721.22 and 8,609.02 is: 12,883.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,505.04 : 15,721.22 = 8,609.02 : x
  2. Step 2: Convert to fraction form
    10,505.04/15,721.22 = 8,609.02/x
  3. Step 3: Cross multiply
    10,505.04x = 15,721.22 × 8,609.02
  4. Step 4: Simplify right side
    10,505.04x = 135,344,297.40
  5. Step 5: Solve for x
    x = 135,344,297.40/10,505.04
  6. Step 6: Final answer
    x = 12,883.75

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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.