Home / 20,429.43-28,191.69-11,931.72

Finding the Fourth Proportional to 20,429.43, 28,191.69 and 11,931.72

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Solution

The fourth proportional to 20,429.43, 28,191.69 and 11,931.72 is: 16,465.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.43 : 28,191.69 = 11,931.72 : x
  2. Step 2: Convert to fraction form
    20,429.43/28,191.69 = 11,931.72/x
  3. Step 3: Cross multiply
    20,429.43x = 28,191.69 × 11,931.72
  4. Step 4: Simplify right side
    20,429.43x = 336,375,351.41
  5. Step 5: Solve for x
    x = 336,375,351.41/20,429.43
  6. Step 6: Final answer
    x = 16,465.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.