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Finding the Fourth Proportional to 10,879.47, 15,012.95 and 6,404.09

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Solution

The fourth proportional to 10,879.47, 15,012.95 and 6,404.09 is: 8,837.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.47 : 15,012.95 = 6,404.09 : x
  2. Step 2: Convert to fraction form
    10,879.47/15,012.95 = 6,404.09/x
  3. Step 3: Cross multiply
    10,879.47x = 15,012.95 × 6,404.09
  4. Step 4: Simplify right side
    10,879.47x = 96,144,175.88
  5. Step 5: Solve for x
    x = 96,144,175.88/10,879.47
  6. Step 6: Final answer
    x = 8,837.21

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1.5x scale

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.