Home / 20,716.15-31,074.19-5,133.78

Finding the Fourth Proportional to 20,716.15, 31,074.19 and 5,133.78

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Solution

The fourth proportional to 20,716.15, 31,074.19 and 5,133.78 is: 7,700.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.15 : 31,074.19 = 5,133.78 : x
  2. Step 2: Convert to fraction form
    20,716.15/31,074.19 = 5,133.78/x
  3. Step 3: Cross multiply
    20,716.15x = 31,074.19 × 5,133.78
  4. Step 4: Simplify right side
    20,716.15x = 159,527,899.77
  5. Step 5: Solve for x
    x = 159,527,899.77/20,716.15
  6. Step 6: Final answer
    x = 7,700.65

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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.