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Finding the Fourth Proportional to 25,980.62, 38,975.82 and 8,455.46

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Solution

The fourth proportional to 25,980.62, 38,975.82 and 8,455.46 is: 12,684.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,980.62 : 38,975.82 = 8,455.46 : x
  2. Step 2: Convert to fraction form
    25,980.62/38,975.82 = 8,455.46/x
  3. Step 3: Cross multiply
    25,980.62x = 38,975.82 × 8,455.46
  4. Step 4: Simplify right side
    25,980.62x = 329,558,486.98
  5. Step 5: Solve for x
    x = 329,558,486.98/25,980.62
  6. Step 6: Final answer
    x = 12,684.78

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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.