Home / 15,754.21-21,740.81-8,680.57

Finding the Fourth Proportional to 15,754.21, 21,740.81 and 8,680.57

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Solution

The fourth proportional to 15,754.21, 21,740.81 and 8,680.57 is: 11,979.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,754.21 : 21,740.81 = 8,680.57 : x
  2. Step 2: Convert to fraction form
    15,754.21/21,740.81 = 8,680.57/x
  3. Step 3: Cross multiply
    15,754.21x = 21,740.81 × 8,680.57
  4. Step 4: Simplify right side
    15,754.21x = 188,722,470.95
  5. Step 5: Solve for x
    x = 188,722,470.95/15,754.21
  6. Step 6: Final answer
    x = 11,979.18

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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.