Home / 15,928.78-21,981.66-8,759.17

Finding the Fourth Proportional to 15,928.78, 21,981.66 and 8,759.17

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Solution

The fourth proportional to 15,928.78, 21,981.66 and 8,759.17 is: 12,087.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.78 : 21,981.66 = 8,759.17 : x
  2. Step 2: Convert to fraction form
    15,928.78/21,981.66 = 8,759.17/x
  3. Step 3: Cross multiply
    15,928.78x = 21,981.66 × 8,759.17
  4. Step 4: Simplify right side
    15,928.78x = 192,541,096.82
  5. Step 5: Solve for x
    x = 192,541,096.82/15,928.78
  6. Step 6: Final answer
    x = 12,087.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.