Home / 20,811.24-31,216.92-5,228.76

Finding the Fourth Proportional to 20,811.24, 31,216.92 and 5,228.76

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Solution

The fourth proportional to 20,811.24, 31,216.92 and 5,228.76 is: 7,843.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.24 : 31,216.92 = 5,228.76 : x
  2. Step 2: Convert to fraction form
    20,811.24/31,216.92 = 5,228.76/x
  3. Step 3: Cross multiply
    20,811.24x = 31,216.92 × 5,228.76
  4. Step 4: Simplify right side
    20,811.24x = 163,225,782.62
  5. Step 5: Solve for x
    x = 163,225,782.62/20,811.24
  6. Step 6: Final answer
    x = 7,843.16

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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.