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Finding the Fourth Proportional to 38,392.38, 52,974.47 and 21,396.20

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Solution

The fourth proportional to 38,392.38, 52,974.47 and 21,396.20 is: 29,522.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,392.38 : 52,974.47 = 21,396.20 : x
  2. Step 2: Convert to fraction form
    38,392.38/52,974.47 = 21,396.20/x
  3. Step 3: Cross multiply
    38,392.38x = 52,974.47 × 21,396.20
  4. Step 4: Simplify right side
    38,392.38x = 1,133,452,143.63
  5. Step 5: Solve for x
    x = 1,133,452,143.63/38,392.38
  6. Step 6: Final answer
    x = 29,522.84

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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.