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Finding the Fourth Proportional to 25,396.80, 38,119.82 and 12,258.40

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Solution

The fourth proportional to 25,396.80, 38,119.82 and 12,258.40 is: 18,399.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,396.80 : 38,119.82 = 12,258.40 : x
  2. Step 2: Convert to fraction form
    25,396.80/38,119.82 = 12,258.40/x
  3. Step 3: Cross multiply
    25,396.80x = 38,119.82 × 12,258.40
  4. Step 4: Simplify right side
    25,396.80x = 467,288,001.49
  5. Step 5: Solve for x
    x = 467,288,001.49/25,396.80
  6. Step 6: Final answer
    x = 18,399.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.