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Finding the Fourth Proportional to 28,160.88, 38,868.96 and 20,226.96

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Solution

The fourth proportional to 28,160.88, 38,868.96 and 20,226.96 is: 27,918.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,160.88 : 38,868.96 = 20,226.96 : x
  2. Step 2: Convert to fraction form
    28,160.88/38,868.96 = 20,226.96/x
  3. Step 3: Cross multiply
    28,160.88x = 38,868.96 × 20,226.96
  4. Step 4: Simplify right side
    28,160.88x = 786,200,899.16
  5. Step 5: Solve for x
    x = 786,200,899.16/28,160.88
  6. Step 6: Final answer
    x = 27,918.19

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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.