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Finding the Fourth Proportional to 8,971.74, 13,448.87 and 4,290.53

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Solution

The fourth proportional to 8,971.74, 13,448.87 and 4,290.53 is: 6,431.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,971.74 : 13,448.87 = 4,290.53 : x
  2. Step 2: Convert to fraction form
    8,971.74/13,448.87 = 4,290.53/x
  3. Step 3: Cross multiply
    8,971.74x = 13,448.87 × 4,290.53
  4. Step 4: Simplify right side
    8,971.74x = 57,702,691.50
  5. Step 5: Solve for x
    x = 57,702,691.50/8,971.74
  6. Step 6: Final answer
    x = 6,431.61

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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.