Home / 10,121.76-13,968.05-5,645.80

Finding the Fourth Proportional to 10,121.76, 13,968.05 and 5,645.80

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Solution

The fourth proportional to 10,121.76, 13,968.05 and 5,645.80 is: 7,791.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.76 : 13,968.05 = 5,645.80 : x
  2. Step 2: Convert to fraction form
    10,121.76/13,968.05 = 5,645.80/x
  3. Step 3: Cross multiply
    10,121.76x = 13,968.05 × 5,645.80
  4. Step 4: Simplify right side
    10,121.76x = 78,860,867.58
  5. Step 5: Solve for x
    x = 78,860,867.58/10,121.76
  6. Step 6: Final answer
    x = 7,791.22

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1.5x scale

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.