Home / 20,891.08-31,327.98-8,878.12

Finding the Fourth Proportional to 20,891.08, 31,327.98 and 8,878.12

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Solution

The fourth proportional to 20,891.08, 31,327.98 and 8,878.12 is: 13,313.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.08 : 31,327.98 = 8,878.12 : x
  2. Step 2: Convert to fraction form
    20,891.08/31,327.98 = 8,878.12/x
  3. Step 3: Cross multiply
    20,891.08x = 31,327.98 × 8,878.12
  4. Step 4: Simplify right side
    20,891.08x = 278,133,565.80
  5. Step 5: Solve for x
    x = 278,133,565.80/20,891.08
  6. Step 6: Final answer
    x = 13,313.51

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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.