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Finding the Fourth Proportional to 15,754.10, 21,741.06 and 8,680.53

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Solution

The fourth proportional to 15,754.10, 21,741.06 and 8,680.53 is: 11,979.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,754.10 : 21,741.06 = 8,680.53 : x
  2. Step 2: Convert to fraction form
    15,754.10/21,741.06 = 8,680.53/x
  3. Step 3: Cross multiply
    15,754.10x = 21,741.06 × 8,680.53
  4. Step 4: Simplify right side
    15,754.10x = 188,723,771.45
  5. Step 5: Solve for x
    x = 188,723,771.45/15,754.10
  6. Step 6: Final answer
    x = 11,979.35

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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.