Home / 20,440.30-28,217.82-13,377.51

Finding the Fourth Proportional to 20,440.30, 28,217.82 and 13,377.51

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Solution

The fourth proportional to 20,440.30, 28,217.82 and 13,377.51 is: 18,467.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.30 : 28,217.82 = 13,377.51 : x
  2. Step 2: Convert to fraction form
    20,440.30/28,217.82 = 13,377.51/x
  3. Step 3: Cross multiply
    20,440.30x = 28,217.82 × 13,377.51
  4. Step 4: Simplify right side
    20,440.30x = 377,484,169.23
  5. Step 5: Solve for x
    x = 377,484,169.23/20,440.30
  6. Step 6: Final answer
    x = 18,467.64

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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.