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Finding the Fourth Proportional to 8,640,054.80, 12,960,082.20 and 6,400,566.80

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Solution

The fourth proportional to 8,640,054.80, 12,960,082.20 and 6,400,566.80 is: 9,600,850.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640,054.80 : 12,960,082.20 = 6,400,566.80 : x
  2. Step 2: Convert to fraction form
    8,640,054.80/12,960,082.20 = 6,400,566.80/x
  3. Step 3: Cross multiply
    8,640,054.80x = 12,960,082.20 × 6,400,566.80
  4. Step 4: Simplify right side
    8,640,054.80x = 82,951,871,854,590.95
  5. Step 5: Solve for x
    x = 82,951,871,854,590.95/8,640,054.80
  6. Step 6: Final answer
    x = 9,600,850.20

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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.