Home / 20,715.58-31,063.20-8,867.68

Finding the Fourth Proportional to 20,715.58, 31,063.20 and 8,867.68

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Solution

The fourth proportional to 20,715.58, 31,063.20 and 8,867.68 is: 13,297.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.58 : 31,063.20 = 8,867.68 : x
  2. Step 2: Convert to fraction form
    20,715.58/31,063.20 = 8,867.68/x
  3. Step 3: Cross multiply
    20,715.58x = 31,063.20 × 8,867.68
  4. Step 4: Simplify right side
    20,715.58x = 275,458,517.38
  5. Step 5: Solve for x
    x = 275,458,517.38/20,715.58
  6. Step 6: Final answer
    x = 13,297.17

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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.