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Finding the Fourth Proportional to 8,705.71, 13,055.80 and 2,860.97

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Solution

The fourth proportional to 8,705.71, 13,055.80 and 2,860.97 is: 4,290.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.71 : 13,055.80 = 2,860.97 : x
  2. Step 2: Convert to fraction form
    8,705.71/13,055.80 = 2,860.97/x
  3. Step 3: Cross multiply
    8,705.71x = 13,055.80 × 2,860.97
  4. Step 4: Simplify right side
    8,705.71x = 37,352,237.82
  5. Step 5: Solve for x
    x = 37,352,237.82/8,705.71
  6. Step 6: Final answer
    x = 4,290.54

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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.