Home / 9,321,428.49-12,859,115.76-7,242,215.60

Finding the Fourth Proportional to 9,321,428.49, 12,859,115.76 and 7,242,215.60

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Solution

The fourth proportional to 9,321,428.49, 12,859,115.76 and 7,242,215.60 is: 9,990,795.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,321,428.49 : 12,859,115.76 = 7,242,215.60 : x
  2. Step 2: Convert to fraction form
    9,321,428.49/12,859,115.76 = 7,242,215.60/x
  3. Step 3: Cross multiply
    9,321,428.49x = 12,859,115.76 × 7,242,215.60
  4. Step 4: Simplify right side
    9,321,428.49x = 93,128,488,694,982.27
  5. Step 5: Solve for x
    x = 93,128,488,694,982.27/9,321,428.49
  6. Step 6: Final answer
    x = 9,990,795.81

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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.