Home / 20,710.20-31,065.30-5,919.60

Finding the Fourth Proportional to 20,710.20, 31,065.30 and 5,919.60

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Solution

The fourth proportional to 20,710.20, 31,065.30 and 5,919.60 is: 8,879.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.20 : 31,065.30 = 5,919.60 : x
  2. Step 2: Convert to fraction form
    20,710.20/31,065.30 = 5,919.60/x
  3. Step 3: Cross multiply
    20,710.20x = 31,065.30 × 5,919.60
  4. Step 4: Simplify right side
    20,710.20x = 183,894,149.88
  5. Step 5: Solve for x
    x = 183,894,149.88/20,710.20
  6. Step 6: Final answer
    x = 8,879.40

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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.