Home / 21,300.32-31,949.36-8,151.68

Finding the Fourth Proportional to 21,300.32, 31,949.36 and 8,151.68

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Solution

The fourth proportional to 21,300.32, 31,949.36 and 8,151.68 is: 12,227.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,300.32 : 31,949.36 = 8,151.68 : x
  2. Step 2: Convert to fraction form
    21,300.32/31,949.36 = 8,151.68/x
  3. Step 3: Cross multiply
    21,300.32x = 31,949.36 × 8,151.68
  4. Step 4: Simplify right side
    21,300.32x = 260,440,958.92
  5. Step 5: Solve for x
    x = 260,440,958.92/21,300.32
  6. Step 6: Final answer
    x = 12,227.09

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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.