Home / 20,511,523.40-28,314,617.94-12,780,385.47

Finding the Fourth Proportional to 20,511,523.40, 28,314,617.94 and 12,780,385.47

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Solution

The fourth proportional to 20,511,523.40, 28,314,617.94 and 12,780,385.47 is: 17,642,362.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,523.40 : 28,314,617.94 = 12,780,385.47 : x
  2. Step 2: Convert to fraction form
    20,511,523.40/28,314,617.94 = 12,780,385.47/x
  3. Step 3: Cross multiply
    20,511,523.40x = 28,314,617.94 × 12,780,385.47
  4. Step 4: Simplify right side
    20,511,523.40x = 361,871,731,708,977.38
  5. Step 5: Solve for x
    x = 361,871,731,708,977.38/20,511,523.40
  6. Step 6: Final answer
    x = 17,642,362.53

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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.