Home / 10,270.20-15,389.10-7,645.80

Finding the Fourth Proportional to 10,270.20, 15,389.10 and 7,645.80

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Solution

The fourth proportional to 10,270.20, 15,389.10 and 7,645.80 is: 11,456.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,270.20 : 15,389.10 = 7,645.80 : x
  2. Step 2: Convert to fraction form
    10,270.20/15,389.10 = 7,645.80/x
  3. Step 3: Cross multiply
    10,270.20x = 15,389.10 × 7,645.80
  4. Step 4: Simplify right side
    10,270.20x = 117,661,980.78
  5. Step 5: Solve for x
    x = 117,661,980.78/10,270.20
  6. Step 6: Final answer
    x = 11,456.64

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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.