Home / 18,930.11-26,121.76-10,972.80

Finding the Fourth Proportional to 18,930.11, 26,121.76 and 10,972.80

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Solution

The fourth proportional to 18,930.11, 26,121.76 and 10,972.80 is: 15,141.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.11 : 26,121.76 = 10,972.80 : x
  2. Step 2: Convert to fraction form
    18,930.11/26,121.76 = 10,972.80/x
  3. Step 3: Cross multiply
    18,930.11x = 26,121.76 × 10,972.80
  4. Step 4: Simplify right side
    18,930.11x = 286,628,820.70
  5. Step 5: Solve for x
    x = 286,628,820.70/18,930.11
  6. Step 6: Final answer
    x = 15,141.43

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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.