Home / 7,981.64-11,972.27-2,138.25

Finding the Fourth Proportional to 7,981.64, 11,972.27 and 2,138.25

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Solution

The fourth proportional to 7,981.64, 11,972.27 and 2,138.25 is: 3,207.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.64 : 11,972.27 = 2,138.25 : x
  2. Step 2: Convert to fraction form
    7,981.64/11,972.27 = 2,138.25/x
  3. Step 3: Cross multiply
    7,981.64x = 11,972.27 × 2,138.25
  4. Step 4: Simplify right side
    7,981.64x = 25,599,695.64
  5. Step 5: Solve for x
    x = 25,599,695.64/7,981.64
  6. Step 6: Final answer
    x = 3,207.32

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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.