Home / 20,667.66-28,521.63-11,236.38

Finding the Fourth Proportional to 20,667.66, 28,521.63 and 11,236.38

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Solution

The fourth proportional to 20,667.66, 28,521.63 and 11,236.38 is: 15,506.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.66 : 28,521.63 = 11,236.38 : x
  2. Step 2: Convert to fraction form
    20,667.66/28,521.63 = 11,236.38/x
  3. Step 3: Cross multiply
    20,667.66x = 28,521.63 × 11,236.38
  4. Step 4: Simplify right side
    20,667.66x = 320,479,872.90
  5. Step 5: Solve for x
    x = 320,479,872.90/20,667.66
  6. Step 6: Final answer
    x = 15,506.35

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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.