Home / 7,981.28-11,971.98-2,787.16

Finding the Fourth Proportional to 7,981.28, 11,971.98 and 2,787.16

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Solution

The fourth proportional to 7,981.28, 11,971.98 and 2,787.16 is: 4,180.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.28 : 11,971.98 = 2,787.16 : x
  2. Step 2: Convert to fraction form
    7,981.28/11,971.98 = 2,787.16/x
  3. Step 3: Cross multiply
    7,981.28x = 11,971.98 × 2,787.16
  4. Step 4: Simplify right side
    7,981.28x = 33,367,823.78
  5. Step 5: Solve for x
    x = 33,367,823.78/7,981.28
  6. Step 6: Final answer
    x = 4,180.76

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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.