Home / 10,988,778.20-15,147,036.86-8,661,897.68

Finding the Fourth Proportional to 10,988,778.20, 15,147,036.86 and 8,661,897.68

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Solution

The fourth proportional to 10,988,778.20, 15,147,036.86 and 8,661,897.68 is: 11,939,642.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,988,778.20 : 15,147,036.86 = 8,661,897.68 : x
  2. Step 2: Convert to fraction form
    10,988,778.20/15,147,036.86 = 8,661,897.68/x
  3. Step 3: Cross multiply
    10,988,778.20x = 15,147,036.86 × 8,661,897.68
  4. Step 4: Simplify right side
    10,988,778.20x = 131,202,083,436,508.47
  5. Step 5: Solve for x
    x = 131,202,083,436,508.47/10,988,778.20
  6. Step 6: Final answer
    x = 11,939,642.52

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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.