Home / 20,554.16-28,364.62-11,122.72

Finding the Fourth Proportional to 20,554.16, 28,364.62 and 11,122.72

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Solution

The fourth proportional to 20,554.16, 28,364.62 and 11,122.72 is: 15,349.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.16 : 28,364.62 = 11,122.72 : x
  2. Step 2: Convert to fraction form
    20,554.16/28,364.62 = 11,122.72/x
  3. Step 3: Cross multiply
    20,554.16x = 28,364.62 × 11,122.72
  4. Step 4: Simplify right side
    20,554.16x = 315,491,726.17
  5. Step 5: Solve for x
    x = 315,491,726.17/20,554.16
  6. Step 6: Final answer
    x = 15,349.29

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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.