Home / 15,754.55-21,742.25-8,680.95

Finding the Fourth Proportional to 15,754.55, 21,742.25 and 8,680.95

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Solution

The fourth proportional to 15,754.55, 21,742.25 and 8,680.95 is: 11,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,754.55 : 21,742.25 = 8,680.95 : x
  2. Step 2: Convert to fraction form
    15,754.55/21,742.25 = 8,680.95/x
  3. Step 3: Cross multiply
    15,754.55x = 21,742.25 × 8,680.95
  4. Step 4: Simplify right side
    15,754.55x = 188,743,341.73
  5. Step 5: Solve for x
    x = 188,743,341.73/15,754.55
  6. Step 6: Final answer
    x = 11,980.25

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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.