Home / 20,421,780.12-28,181,537.28-11,129,589.18

Finding the Fourth Proportional to 20,421,780.12, 28,181,537.28 and 11,129,589.18

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Solution

The fourth proportional to 20,421,780.12, 28,181,537.28 and 11,129,589.18 is: 15,358,550.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421,780.12 : 28,181,537.28 = 11,129,589.18 : x
  2. Step 2: Convert to fraction form
    20,421,780.12/28,181,537.28 = 11,129,589.18/x
  3. Step 3: Cross multiply
    20,421,780.12x = 28,181,537.28 × 11,129,589.18
  4. Step 4: Simplify right side
    20,421,780.12x = 313,648,932,387,254.62
  5. Step 5: Solve for x
    x = 313,648,932,387,254.62/20,421,780.12
  6. Step 6: Final answer
    x = 15,358,550.06

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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.