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Finding the Fourth Proportional to 12,578,700.24, 18,868,469.85 and 3,480,035.90

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Solution

The fourth proportional to 12,578,700.24, 18,868,469.85 and 3,480,035.90 is: 5,220,169.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578,700.24 : 18,868,469.85 = 3,480,035.90 : x
  2. Step 2: Convert to fraction form
    12,578,700.24/18,868,469.85 = 3,480,035.90/x
  3. Step 3: Cross multiply
    12,578,700.24x = 18,868,469.85 × 3,480,035.90
  4. Step 4: Simplify right side
    12,578,700.24x = 65,662,952,361,725.27
  5. Step 5: Solve for x
    x = 65,662,952,361,725.27/12,578,700.24
  6. Step 6: Final answer
    x = 5,220,169.90

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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.