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Finding the Fourth Proportional to 38,390.54, 52,979.47 and 21,394.31

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Solution

The fourth proportional to 38,390.54, 52,979.47 and 21,394.31 is: 29,524.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,390.54 : 52,979.47 = 21,394.31 : x
  2. Step 2: Convert to fraction form
    38,390.54/52,979.47 = 21,394.31/x
  3. Step 3: Cross multiply
    38,390.54x = 52,979.47 × 21,394.31
  4. Step 4: Simplify right side
    38,390.54x = 1,133,458,886.43
  5. Step 5: Solve for x
    x = 1,133,458,886.43/38,390.54
  6. Step 6: Final answer
    x = 29,524.44

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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.