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Finding the Fourth Proportional to 8,986.66, 12,398.64 and 5,448.58

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Solution

The fourth proportional to 8,986.66, 12,398.64 and 5,448.58 is: 7,517.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.66 : 12,398.64 = 5,448.58 : x
  2. Step 2: Convert to fraction form
    8,986.66/12,398.64 = 5,448.58/x
  3. Step 3: Cross multiply
    8,986.66x = 12,398.64 × 5,448.58
  4. Step 4: Simplify right side
    8,986.66x = 67,554,919.94
  5. Step 5: Solve for x
    x = 67,554,919.94/8,986.66
  6. Step 6: Final answer
    x = 7,517.25

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1.5x scale

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.