Home / 20,422,128.80-28,182,542.19-11,129,701.07

Finding the Fourth Proportional to 20,422,128.80, 28,182,542.19 and 11,129,701.07

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Solution

The fourth proportional to 20,422,128.80, 28,182,542.19 and 11,129,701.07 is: 15,358,989.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422,128.80 : 28,182,542.19 = 11,129,701.07 : x
  2. Step 2: Convert to fraction form
    20,422,128.80/28,182,542.19 = 11,129,701.07/x
  3. Step 3: Cross multiply
    20,422,128.80x = 28,182,542.19 × 11,129,701.07
  4. Step 4: Simplify right side
    20,422,128.80x = 313,663,269,996,083.12
  5. Step 5: Solve for x
    x = 313,663,269,996,083.12/20,422,128.80
  6. Step 6: Final answer
    x = 15,358,989.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.