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Finding the Fourth Proportional to 38,672.25, 53,367.71 and 21,905.25

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Solution

The fourth proportional to 38,672.25, 53,367.71 and 21,905.25 is: 30,229.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,672.25 : 53,367.71 = 21,905.25 : x
  2. Step 2: Convert to fraction form
    38,672.25/53,367.71 = 21,905.25/x
  3. Step 3: Cross multiply
    38,672.25x = 53,367.71 × 21,905.25
  4. Step 4: Simplify right side
    38,672.25x = 1,169,032,919.95
  5. Step 5: Solve for x
    x = 1,169,032,919.95/38,672.25
  6. Step 6: Final answer
    x = 30,229.25

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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.