Home / 20,511,519.90-28,314,613.09-12,780,381.95

Finding the Fourth Proportional to 20,511,519.90, 28,314,613.09 and 12,780,381.95

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Solution

The fourth proportional to 20,511,519.90, 28,314,613.09 and 12,780,381.95 is: 17,642,357.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,519.90 : 28,314,613.09 = 12,780,381.95 : x
  2. Step 2: Convert to fraction form
    20,511,519.90/28,314,613.09 = 12,780,381.95/x
  3. Step 3: Cross multiply
    20,511,519.90x = 28,314,613.09 × 12,780,381.95
  4. Step 4: Simplify right side
    20,511,519.90x = 361,871,570,056,669.69
  5. Step 5: Solve for x
    x = 361,871,570,056,669.69/20,511,519.90
  6. Step 6: Final answer
    x = 17,642,357.65

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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.