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Finding the Fourth Proportional to 13,891,978.85, 20,826,841.22 and 6,601,780.19

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Solution

The fourth proportional to 13,891,978.85, 20,826,841.22 and 6,601,780.19 is: 9,897,382.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891,978.85 : 20,826,841.22 = 6,601,780.19 : x
  2. Step 2: Convert to fraction form
    13,891,978.85/20,826,841.22 = 6,601,780.19/x
  3. Step 3: Cross multiply
    13,891,978.85x = 20,826,841.22 × 6,601,780.19
  4. Step 4: Simplify right side
    13,891,978.85x = 137,494,227,649,328.31
  5. Step 5: Solve for x
    x = 137,494,227,649,328.31/13,891,978.85
  6. Step 6: Final answer
    x = 9,897,382.45

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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.