Home / 8,085,686.80-12,128,530.20-7,979,398.60

Finding the Fourth Proportional to 8,085,686.80, 12,128,530.20 and 7,979,398.60

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Solution

The fourth proportional to 8,085,686.80, 12,128,530.20 and 7,979,398.60 is: 11,969,097.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085,686.80 : 12,128,530.20 = 7,979,398.60 : x
  2. Step 2: Convert to fraction form
    8,085,686.80/12,128,530.20 = 7,979,398.60/x
  3. Step 3: Cross multiply
    8,085,686.80x = 12,128,530.20 × 7,979,398.60
  4. Step 4: Simplify right side
    8,085,686.80x = 96,778,376,897,937.70
  5. Step 5: Solve for x
    x = 96,778,376,897,937.70/8,085,686.80
  6. Step 6: Final answer
    x = 11,969,097.90

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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.