Home / 20,717.55-28,590.06-11,286.09

Finding the Fourth Proportional to 20,717.55, 28,590.06 and 11,286.09

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Solution

The fourth proportional to 20,717.55, 28,590.06 and 11,286.09 is: 15,574.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.55 : 28,590.06 = 11,286.09 : x
  2. Step 2: Convert to fraction form
    20,717.55/28,590.06 = 11,286.09/x
  3. Step 3: Cross multiply
    20,717.55x = 28,590.06 × 11,286.09
  4. Step 4: Simplify right side
    20,717.55x = 322,669,990.27
  5. Step 5: Solve for x
    x = 322,669,990.27/20,717.55
  6. Step 6: Final answer
    x = 15,574.72

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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.