Home / 20,879.30-31,320.06-10,202.42

Finding the Fourth Proportional to 20,879.30, 31,320.06 and 10,202.42

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Solution

The fourth proportional to 20,879.30, 31,320.06 and 10,202.42 is: 15,304.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.30 : 31,320.06 = 10,202.42 : x
  2. Step 2: Convert to fraction form
    20,879.30/31,320.06 = 10,202.42/x
  3. Step 3: Cross multiply
    20,879.30x = 31,320.06 × 10,202.42
  4. Step 4: Simplify right side
    20,879.30x = 319,540,406.55
  5. Step 5: Solve for x
    x = 319,540,406.55/20,879.30
  6. Step 6: Final answer
    x = 15,304.17

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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.