Home / 20,870.70-31,311.19-6,079.75

Finding the Fourth Proportional to 20,870.70, 31,311.19 and 6,079.75

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Solution

The fourth proportional to 20,870.70, 31,311.19 and 6,079.75 is: 9,121.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.70 : 31,311.19 = 6,079.75 : x
  2. Step 2: Convert to fraction form
    20,870.70/31,311.19 = 6,079.75/x
  3. Step 3: Cross multiply
    20,870.70x = 31,311.19 × 6,079.75
  4. Step 4: Simplify right side
    20,870.70x = 190,364,207.40
  5. Step 5: Solve for x
    x = 190,364,207.40/20,870.70
  6. Step 6: Final answer
    x = 9,121.12

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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.