Home / 20,718.14-31,081.26-7,568.78

Finding the Fourth Proportional to 20,718.14, 31,081.26 and 7,568.78

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Solution

The fourth proportional to 20,718.14, 31,081.26 and 7,568.78 is: 11,354.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.14 : 31,081.26 = 7,568.78 : x
  2. Step 2: Convert to fraction form
    20,718.14/31,081.26 = 7,568.78/x
  3. Step 3: Cross multiply
    20,718.14x = 31,081.26 × 7,568.78
  4. Step 4: Simplify right side
    20,718.14x = 235,247,219.06
  5. Step 5: Solve for x
    x = 235,247,219.06/20,718.14
  6. Step 6: Final answer
    x = 11,354.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.