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Finding the Fourth Proportional to 15,751.13, 21,736.62 and 9,377.96

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Solution

The fourth proportional to 15,751.13, 21,736.62 and 9,377.96 is: 12,941.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,751.13 : 21,736.62 = 9,377.96 : x
  2. Step 2: Convert to fraction form
    15,751.13/21,736.62 = 9,377.96/x
  3. Step 3: Cross multiply
    15,751.13x = 21,736.62 × 9,377.96
  4. Step 4: Simplify right side
    15,751.13x = 203,845,081.07
  5. Step 5: Solve for x
    x = 203,845,081.07/15,751.13
  6. Step 6: Final answer
    x = 12,941.62

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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.