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Finding the Fourth Proportional to 25,993.76, 38,981.44 and 8,460.32

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Solution

The fourth proportional to 25,993.76, 38,981.44 and 8,460.32 is: 12,687.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,993.76 : 38,981.44 = 8,460.32 : x
  2. Step 2: Convert to fraction form
    25,993.76/38,981.44 = 8,460.32/x
  3. Step 3: Cross multiply
    25,993.76x = 38,981.44 × 8,460.32
  4. Step 4: Simplify right side
    25,993.76x = 329,795,456.46
  5. Step 5: Solve for x
    x = 329,795,456.46/25,993.76
  6. Step 6: Final answer
    x = 12,687.49

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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.