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Finding the Fourth Proportional to 25,908.40, 38,830.20 and 18,974.80

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Solution

The fourth proportional to 25,908.40, 38,830.20 and 18,974.80 is: 28,438.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,908.40 : 38,830.20 = 18,974.80 : x
  2. Step 2: Convert to fraction form
    25,908.40/38,830.20 = 18,974.80/x
  3. Step 3: Cross multiply
    25,908.40x = 38,830.20 × 18,974.80
  4. Step 4: Simplify right side
    25,908.40x = 736,795,278.96
  5. Step 5: Solve for x
    x = 736,795,278.96/25,908.40
  6. Step 6: Final answer
    x = 28,438.47

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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.