Home / 20,581.09-28,401.72-11,149.66

Finding the Fourth Proportional to 20,581.09, 28,401.72 and 11,149.66

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Solution

The fourth proportional to 20,581.09, 28,401.72 and 11,149.66 is: 15,386.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.09 : 28,401.72 = 11,149.66 : x
  2. Step 2: Convert to fraction form
    20,581.09/28,401.72 = 11,149.66/x
  3. Step 3: Cross multiply
    20,581.09x = 28,401.72 × 11,149.66
  4. Step 4: Simplify right side
    20,581.09x = 316,669,521.42
  5. Step 5: Solve for x
    x = 316,669,521.42/20,581.09
  6. Step 6: Final answer
    x = 15,386.43

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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.