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Finding the Fourth Proportional to 8,685.58, 11,986.32 and 5,326.47

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Solution

The fourth proportional to 8,685.58, 11,986.32 and 5,326.47 is: 7,350.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.58 : 11,986.32 = 5,326.47 : x
  2. Step 2: Convert to fraction form
    8,685.58/11,986.32 = 5,326.47/x
  3. Step 3: Cross multiply
    8,685.58x = 11,986.32 × 5,326.47
  4. Step 4: Simplify right side
    8,685.58x = 63,844,773.89
  5. Step 5: Solve for x
    x = 63,844,773.89/8,685.58
  6. Step 6: Final answer
    x = 7,350.66

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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.