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Finding the Fourth Proportional to 25,754.80, 38,636.55 and 7,981.39

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Solution

The fourth proportional to 25,754.80, 38,636.55 and 7,981.39 is: 11,973.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,754.80 : 38,636.55 = 7,981.39 : x
  2. Step 2: Convert to fraction form
    25,754.80/38,636.55 = 7,981.39/x
  3. Step 3: Cross multiply
    25,754.80x = 38,636.55 × 7,981.39
  4. Step 4: Simplify right side
    25,754.80x = 308,373,373.80
  5. Step 5: Solve for x
    x = 308,373,373.80/25,754.80
  6. Step 6: Final answer
    x = 11,973.43

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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.