Home / 12,120,657.20-18,180,985.80-3,145,209.20

Finding the Fourth Proportional to 12,120,657.20, 18,180,985.80 and 3,145,209.20

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Solution

The fourth proportional to 12,120,657.20, 18,180,985.80 and 3,145,209.20 is: 4,717,813.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120,657.20 : 18,180,985.80 = 3,145,209.20 : x
  2. Step 2: Convert to fraction form
    12,120,657.20/18,180,985.80 = 3,145,209.20/x
  3. Step 3: Cross multiply
    12,120,657.20x = 18,180,985.80 × 3,145,209.20
  4. Step 4: Simplify right side
    12,120,657.20x = 57,183,003,803,229.37
  5. Step 5: Solve for x
    x = 57,183,003,803,229.37/12,120,657.20
  6. Step 6: Final answer
    x = 4,717,813.80

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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.