Home / 12,630,905.20-18,918,364.20-9,781,778.80

Finding the Fourth Proportional to 12,630,905.20, 18,918,364.20 and 9,781,778.80

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Solution

The fourth proportional to 12,630,905.20, 18,918,364.20 and 9,781,778.80 is: 14,650,989.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,630,905.20 : 18,918,364.20 = 9,781,778.80 : x
  2. Step 2: Convert to fraction form
    12,630,905.20/18,918,364.20 = 9,781,778.80/x
  3. Step 3: Cross multiply
    12,630,905.20x = 18,918,364.20 × 9,781,778.80
  4. Step 4: Simplify right side
    12,630,905.20x = 185,055,253,862,238.97
  5. Step 5: Solve for x
    x = 185,055,253,862,238.97/12,630,905.20
  6. Step 6: Final answer
    x = 14,650,989.06

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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.