Home / 15,851.14-21,874.38-8,680.98

Finding the Fourth Proportional to 15,851.14, 21,874.38 and 8,680.98

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Solution

The fourth proportional to 15,851.14, 21,874.38 and 8,680.98 is: 11,979.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.14 : 21,874.38 = 8,680.98 : x
  2. Step 2: Convert to fraction form
    15,851.14/21,874.38 = 8,680.98/x
  3. Step 3: Cross multiply
    15,851.14x = 21,874.38 × 8,680.98
  4. Step 4: Simplify right side
    15,851.14x = 189,891,055.29
  5. Step 5: Solve for x
    x = 189,891,055.29/15,851.14
  6. Step 6: Final answer
    x = 11,979.65

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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.