Home / 21,288.24-31,934.68-8,151.76

Finding the Fourth Proportional to 21,288.24, 31,934.68 and 8,151.76

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Solution

The fourth proportional to 21,288.24, 31,934.68 and 8,151.76 is: 12,228.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.24 : 31,934.68 = 8,151.76 : x
  2. Step 2: Convert to fraction form
    21,288.24/31,934.68 = 8,151.76/x
  3. Step 3: Cross multiply
    21,288.24x = 31,934.68 × 8,151.76
  4. Step 4: Simplify right side
    21,288.24x = 260,323,847.04
  5. Step 5: Solve for x
    x = 260,323,847.04/21,288.24
  6. Step 6: Final answer
    x = 12,228.53

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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.