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Finding the Fourth Proportional to 38,398.40, 52,994.09 and 21,404.20

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Solution

The fourth proportional to 38,398.40, 52,994.09 and 21,404.20 is: 29,540.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,398.40 : 52,994.09 = 21,404.20 : x
  2. Step 2: Convert to fraction form
    38,398.40/52,994.09 = 21,404.20/x
  3. Step 3: Cross multiply
    38,398.40x = 52,994.09 × 21,404.20
  4. Step 4: Simplify right side
    38,398.40x = 1,134,295,729.19
  5. Step 5: Solve for x
    x = 1,134,295,729.19/38,398.40
  6. Step 6: Final answer
    x = 29,540.18

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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.