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Finding the Fourth Proportional to 8,465.81, 12,699.55 and 2,918.43

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Solution

The fourth proportional to 8,465.81, 12,699.55 and 2,918.43 is: 4,377.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,465.81 : 12,699.55 = 2,918.43 : x
  2. Step 2: Convert to fraction form
    8,465.81/12,699.55 = 2,918.43/x
  3. Step 3: Cross multiply
    8,465.81x = 12,699.55 × 2,918.43
  4. Step 4: Simplify right side
    8,465.81x = 37,062,684.21
  5. Step 5: Solve for x
    x = 37,062,684.21/8,465.81
  6. Step 6: Final answer
    x = 4,377.93

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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.