Home / 8,085,385.70-12,128,078.55-6,278,486.30

Finding the Fourth Proportional to 8,085,385.70, 12,128,078.55 and 6,278,486.30

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Solution

The fourth proportional to 8,085,385.70, 12,128,078.55 and 6,278,486.30 is: 9,417,729.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085,385.70 : 12,128,078.55 = 6,278,486.30 : x
  2. Step 2: Convert to fraction form
    8,085,385.70/12,128,078.55 = 6,278,486.30/x
  3. Step 3: Cross multiply
    8,085,385.70x = 12,128,078.55 × 6,278,486.30
  4. Step 4: Simplify right side
    8,085,385.70x = 76,145,975,021,498.88
  5. Step 5: Solve for x
    x = 76,145,975,021,498.88/8,085,385.70
  6. Step 6: Final answer
    x = 9,417,729.45

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Double scale
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Similar ratio
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1.5x scale

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.