Home / 10,121.74-13,968.07-5,645.77

Finding the Fourth Proportional to 10,121.74, 13,968.07 and 5,645.77

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Solution

The fourth proportional to 10,121.74, 13,968.07 and 5,645.77 is: 7,791.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.74 : 13,968.07 = 5,645.77 : x
  2. Step 2: Convert to fraction form
    10,121.74/13,968.07 = 5,645.77/x
  3. Step 3: Cross multiply
    10,121.74x = 13,968.07 × 5,645.77
  4. Step 4: Simplify right side
    10,121.74x = 78,860,461.53
  5. Step 5: Solve for x
    x = 78,860,461.53/10,121.74
  6. Step 6: Final answer
    x = 7,791.20

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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.