Home / 15,891.71-21,928.12-9,516.80

Finding the Fourth Proportional to 15,891.71, 21,928.12 and 9,516.80

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Solution

The fourth proportional to 15,891.71, 21,928.12 and 9,516.80 is: 13,131.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,891.71 : 21,928.12 = 9,516.80 : x
  2. Step 2: Convert to fraction form
    15,891.71/21,928.12 = 9,516.80/x
  3. Step 3: Cross multiply
    15,891.71x = 21,928.12 × 9,516.80
  4. Step 4: Simplify right side
    15,891.71x = 208,685,563.44
  5. Step 5: Solve for x
    x = 208,685,563.44/15,891.71
  6. Step 6: Final answer
    x = 13,131.73

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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.