Home / 7,981,805.20-11,972,707.80-7,320,456.40

Finding the Fourth Proportional to 7,981,805.20, 11,972,707.80 and 7,320,456.40

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Solution

The fourth proportional to 7,981,805.20, 11,972,707.80 and 7,320,456.40 is: 10,980,684.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981,805.20 : 11,972,707.80 = 7,320,456.40 : x
  2. Step 2: Convert to fraction form
    7,981,805.20/11,972,707.80 = 7,320,456.40/x
  3. Step 3: Cross multiply
    7,981,805.20x = 11,972,707.80 × 7,320,456.40
  4. Step 4: Simplify right side
    7,981,805.20x = 87,645,685,439,839.94
  5. Step 5: Solve for x
    x = 87,645,685,439,839.94/7,981,805.20
  6. Step 6: Final answer
    x = 10,980,684.60

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1.5x scale

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.