Home / 13,172.13-18,174.11-7,868.25

Finding the Fourth Proportional to 13,172.13, 18,174.11 and 7,868.25

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Solution

The fourth proportional to 13,172.13, 18,174.11 and 7,868.25 is: 10,856.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,172.13 : 18,174.11 = 7,868.25 : x
  2. Step 2: Convert to fraction form
    13,172.13/18,174.11 = 7,868.25/x
  3. Step 3: Cross multiply
    13,172.13x = 18,174.11 × 7,868.25
  4. Step 4: Simplify right side
    13,172.13x = 142,998,401.67
  5. Step 5: Solve for x
    x = 142,998,401.67/13,172.13
  6. Step 6: Final answer
    x = 10,856.13

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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.