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Finding the Fourth Proportional to 38,917.90, 53,706.90 and 22,150.90

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Solution

The fourth proportional to 38,917.90, 53,706.90 and 22,150.90 is: 30,568.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,917.90 : 53,706.90 = 22,150.90 : x
  2. Step 2: Convert to fraction form
    38,917.90/53,706.90 = 22,150.90/x
  3. Step 3: Cross multiply
    38,917.90x = 53,706.90 × 22,150.90
  4. Step 4: Simplify right side
    38,917.90x = 1,189,656,171.21
  5. Step 5: Solve for x
    x = 1,189,656,171.21/38,917.90
  6. Step 6: Final answer
    x = 30,568.35

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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.