Home / 20,788.13-31,182.20-8,313.72

Finding the Fourth Proportional to 20,788.13, 31,182.20 and 8,313.72

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Solution

The fourth proportional to 20,788.13, 31,182.20 and 8,313.72 is: 12,470.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.13 : 31,182.20 = 8,313.72 : x
  2. Step 2: Convert to fraction form
    20,788.13/31,182.20 = 8,313.72/x
  3. Step 3: Cross multiply
    20,788.13x = 31,182.20 × 8,313.72
  4. Step 4: Simplify right side
    20,788.13x = 259,240,038.22
  5. Step 5: Solve for x
    x = 259,240,038.22/20,788.13
  6. Step 6: Final answer
    x = 12,470.58

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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.