Home / 20,717.64-28,590.45-11,286.21

Finding the Fourth Proportional to 20,717.64, 28,590.45 and 11,286.21

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Solution

The fourth proportional to 20,717.64, 28,590.45 and 11,286.21 is: 15,575.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.64 : 28,590.45 = 11,286.21 : x
  2. Step 2: Convert to fraction form
    20,717.64/28,590.45 = 11,286.21/x
  3. Step 3: Cross multiply
    20,717.64x = 28,590.45 × 11,286.21
  4. Step 4: Simplify right side
    20,717.64x = 322,677,822.69
  5. Step 5: Solve for x
    x = 322,677,822.69/20,717.64
  6. Step 6: Final answer
    x = 15,575.03

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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.