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Finding the Fourth Proportional to 9,981,909.82, 13,775,077.06 and 5,398,231.20

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Solution

The fourth proportional to 9,981,909.82, 13,775,077.06 and 5,398,231.20 is: 7,449,581.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,981,909.82 : 13,775,077.06 = 5,398,231.20 : x
  2. Step 2: Convert to fraction form
    9,981,909.82/13,775,077.06 = 5,398,231.20/x
  3. Step 3: Cross multiply
    9,981,909.82x = 13,775,077.06 × 5,398,231.20
  4. Step 4: Simplify right side
    9,981,909.82x = 74,361,050,767,696.28
  5. Step 5: Solve for x
    x = 74,361,050,767,696.28/9,981,909.82
  6. Step 6: Final answer
    x = 7,449,581.50

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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.