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Finding the Fourth Proportional to 8,689.95, 11,987.73 and 5,497.89

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Solution

The fourth proportional to 8,689.95, 11,987.73 and 5,497.89 is: 7,584.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.95 : 11,987.73 = 5,497.89 : x
  2. Step 2: Convert to fraction form
    8,689.95/11,987.73 = 5,497.89/x
  3. Step 3: Cross multiply
    8,689.95x = 11,987.73 × 5,497.89
  4. Step 4: Simplify right side
    8,689.95x = 65,907,220.89
  5. Step 5: Solve for x
    x = 65,907,220.89/8,689.95
  6. Step 6: Final answer
    x = 7,584.30

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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.