Home / 15,928.26-21,981.56-8,758.72

Finding the Fourth Proportional to 15,928.26, 21,981.56 and 8,758.72

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Solution

The fourth proportional to 15,928.26, 21,981.56 and 8,758.72 is: 12,087.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.26 : 21,981.56 = 8,758.72 : x
  2. Step 2: Convert to fraction form
    15,928.26/21,981.56 = 8,758.72/x
  3. Step 3: Cross multiply
    15,928.26x = 21,981.56 × 8,758.72
  4. Step 4: Simplify right side
    15,928.26x = 192,530,378.58
  5. Step 5: Solve for x
    x = 192,530,378.58/15,928.26
  6. Step 6: Final answer
    x = 12,087.35

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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.