Home / 13,131.90-18,122.27-7,163.78

Finding the Fourth Proportional to 13,131.90, 18,122.27 and 7,163.78

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Solution

The fourth proportional to 13,131.90, 18,122.27 and 7,163.78 is: 9,886.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.90 : 18,122.27 = 7,163.78 : x
  2. Step 2: Convert to fraction form
    13,131.90/18,122.27 = 7,163.78/x
  3. Step 3: Cross multiply
    13,131.90x = 18,122.27 × 7,163.78
  4. Step 4: Simplify right side
    13,131.90x = 129,823,828.95
  5. Step 5: Solve for x
    x = 129,823,828.95/13,131.90
  6. Step 6: Final answer
    x = 9,886.14

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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.