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Finding the Fourth Proportional to 8,709.87, 13,067.10 and 5,005.47

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Solution

The fourth proportional to 8,709.87, 13,067.10 and 5,005.47 is: 7,509.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.87 : 13,067.10 = 5,005.47 : x
  2. Step 2: Convert to fraction form
    8,709.87/13,067.10 = 5,005.47/x
  3. Step 3: Cross multiply
    8,709.87x = 13,067.10 × 5,005.47
  4. Step 4: Simplify right side
    8,709.87x = 65,406,977.04
  5. Step 5: Solve for x
    x = 65,406,977.04/8,709.87
  6. Step 6: Final answer
    x = 7,509.52

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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.