Home / 13,511,780.87-18,647,591.34-7,711,430.40

Finding the Fourth Proportional to 13,511,780.87, 18,647,591.34 and 7,711,430.40

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Solution

The fourth proportional to 13,511,780.87, 18,647,591.34 and 7,711,430.40 is: 10,642,535.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511,780.87 : 18,647,591.34 = 7,711,430.40 : x
  2. Step 2: Convert to fraction form
    13,511,780.87/18,647,591.34 = 7,711,430.40/x
  3. Step 3: Cross multiply
    13,511,780.87x = 18,647,591.34 × 7,711,430.40
  4. Step 4: Simplify right side
    13,511,780.87x = 143,799,602,794,890.12
  5. Step 5: Solve for x
    x = 143,799,602,794,890.12/13,511,780.87
  6. Step 6: Final answer
    x = 10,642,535.15

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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.