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Finding the Fourth Proportional to 20,759.01, 28,648.13 and 11,328.09

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Solution

The fourth proportional to 20,759.01, 28,648.13 and 11,328.09 is: 15,633.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.01 : 28,648.13 = 11,328.09 : x
  2. Step 2: Convert to fraction form
    20,759.01/28,648.13 = 11,328.09/x
  3. Step 3: Cross multiply
    20,759.01x = 28,648.13 × 11,328.09
  4. Step 4: Simplify right side
    20,759.01x = 324,528,538.33
  5. Step 5: Solve for x
    x = 324,528,538.33/20,759.01
  6. Step 6: Final answer
    x = 15,633.14

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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.