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Finding the Fourth Proportional to 6,543.72, 9,815.31 and 4,458.51

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Solution

The fourth proportional to 6,543.72, 9,815.31 and 4,458.51 is: 6,687.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,543.72 : 9,815.31 = 4,458.51 : x
  2. Step 2: Convert to fraction form
    6,543.72/9,815.31 = 4,458.51/x
  3. Step 3: Cross multiply
    6,543.72x = 9,815.31 × 4,458.51
  4. Step 4: Simplify right side
    6,543.72x = 43,761,657.79
  5. Step 5: Solve for x
    x = 43,761,657.79/6,543.72
  6. Step 6: Final answer
    x = 6,687.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.