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Finding the Fourth Proportional to 38,379.60, 52,963.01 and 21,383.78

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Solution

The fourth proportional to 38,379.60, 52,963.01 and 21,383.78 is: 29,509.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,379.60 : 52,963.01 = 21,383.78 : x
  2. Step 2: Convert to fraction form
    38,379.60/52,963.01 = 21,383.78/x
  3. Step 3: Cross multiply
    38,379.60x = 52,963.01 × 21,383.78
  4. Step 4: Simplify right side
    38,379.60x = 1,132,548,982.24
  5. Step 5: Solve for x
    x = 1,132,548,982.24/38,379.60
  6. Step 6: Final answer
    x = 29,509.14

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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.