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Finding the Fourth Proportional to 8,666.11, 11,962.29 and 5,129.31

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Solution

The fourth proportional to 8,666.11, 11,962.29 and 5,129.31 is: 7,080.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.11 : 11,962.29 = 5,129.31 : x
  2. Step 2: Convert to fraction form
    8,666.11/11,962.29 = 5,129.31/x
  3. Step 3: Cross multiply
    8,666.11x = 11,962.29 × 5,129.31
  4. Step 4: Simplify right side
    8,666.11x = 61,358,293.72
  5. Step 5: Solve for x
    x = 61,358,293.72/8,666.11
  6. Step 6: Final answer
    x = 7,080.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.