Home / 21,286.24-31,931.52-8,149.66

Finding the Fourth Proportional to 21,286.24, 31,931.52 and 8,149.66

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Solution

The fourth proportional to 21,286.24, 31,931.52 and 8,149.66 is: 12,225.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.24 : 31,931.52 = 8,149.66 : x
  2. Step 2: Convert to fraction form
    21,286.24/31,931.52 = 8,149.66/x
  3. Step 3: Cross multiply
    21,286.24x = 31,931.52 × 8,149.66
  4. Step 4: Simplify right side
    21,286.24x = 260,231,031.28
  5. Step 5: Solve for x
    x = 260,231,031.28/21,286.24
  6. Step 6: Final answer
    x = 12,225.32

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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.