Home / 18,909,969.20-28,361,017.20-8,127,621.80

Finding the Fourth Proportional to 18,909,969.20, 28,361,017.20 and 8,127,621.80

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Solution

The fourth proportional to 18,909,969.20, 28,361,017.20 and 8,127,621.80 is: 12,189,740.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909,969.20 : 28,361,017.20 = 8,127,621.80 : x
  2. Step 2: Convert to fraction form
    18,909,969.20/28,361,017.20 = 8,127,621.80/x
  3. Step 3: Cross multiply
    18,909,969.20x = 28,361,017.20 × 8,127,621.80
  4. Step 4: Simplify right side
    18,909,969.20x = 230,507,621,664,894.94
  5. Step 5: Solve for x
    x = 230,507,621,664,894.94/18,909,969.20
  6. Step 6: Final answer
    x = 12,189,740.72

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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.