Home / 20,892.08-31,329.48-8,879.12

Finding the Fourth Proportional to 20,892.08, 31,329.48 and 8,879.12

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Solution

The fourth proportional to 20,892.08, 31,329.48 and 8,879.12 is: 13,315.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.08 : 31,329.48 = 8,879.12 : x
  2. Step 2: Convert to fraction form
    20,892.08/31,329.48 = 8,879.12/x
  3. Step 3: Cross multiply
    20,892.08x = 31,329.48 × 8,879.12
  4. Step 4: Simplify right side
    20,892.08x = 278,178,212.46
  5. Step 5: Solve for x
    x = 278,178,212.46/20,892.08
  6. Step 6: Final answer
    x = 13,315.01

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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.