Home / 20,139,324.80-30,138,128.40-18,438,713.60

Finding the Fourth Proportional to 20,139,324.80, 30,138,128.40 and 18,438,713.60

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Solution

The fourth proportional to 20,139,324.80, 30,138,128.40 and 18,438,713.60 is: 27,593,195.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139,324.80 : 30,138,128.40 = 18,438,713.60 : x
  2. Step 2: Convert to fraction form
    20,139,324.80/30,138,128.40 = 18,438,713.60/x
  3. Step 3: Cross multiply
    20,139,324.80x = 30,138,128.40 × 18,438,713.60
  4. Step 4: Simplify right side
    20,139,324.80x = 555,708,318,007,626.25
  5. Step 5: Solve for x
    x = 555,708,318,007,626.25/20,139,324.80
  6. Step 6: Final answer
    x = 27,593,195.08

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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.