Home / 12,520,348.20-18,781,790.76-4,321,921.86

Finding the Fourth Proportional to 12,520,348.20, 18,781,790.76 and 4,321,921.86

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Solution

The fourth proportional to 12,520,348.20, 18,781,790.76 and 4,321,921.86 is: 6,483,320.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,520,348.20 : 18,781,790.76 = 4,321,921.86 : x
  2. Step 2: Convert to fraction form
    12,520,348.20/18,781,790.76 = 4,321,921.86/x
  3. Step 3: Cross multiply
    12,520,348.20x = 18,781,790.76 × 4,321,921.86
  4. Step 4: Simplify right side
    12,520,348.20x = 81,173,432,055,590.03
  5. Step 5: Solve for x
    x = 81,173,432,055,590.03/12,520,348.20
  6. Step 6: Final answer
    x = 6,483,320.65

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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.