Home / 18,418.88-25,418.40-10,971.20

Finding the Fourth Proportional to 18,418.88, 25,418.40 and 10,971.20

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Solution

The fourth proportional to 18,418.88, 25,418.40 and 10,971.20 is: 15,140.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,418.88 : 25,418.40 = 10,971.20 : x
  2. Step 2: Convert to fraction form
    18,418.88/25,418.40 = 10,971.20/x
  3. Step 3: Cross multiply
    18,418.88x = 25,418.40 × 10,971.20
  4. Step 4: Simplify right side
    18,418.88x = 278,870,350.08
  5. Step 5: Solve for x
    x = 278,870,350.08/18,418.88
  6. Step 6: Final answer
    x = 15,140.46

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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.