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Finding the Fourth Proportional to 9,966.65, 13,759.88 and 8,859.58

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Solution

The fourth proportional to 9,966.65, 13,759.88 and 8,859.58 is: 12,231.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,966.65 : 13,759.88 = 8,859.58 : x
  2. Step 2: Convert to fraction form
    9,966.65/13,759.88 = 8,859.58/x
  3. Step 3: Cross multiply
    9,966.65x = 13,759.88 × 8,859.58
  4. Step 4: Simplify right side
    9,966.65x = 121,906,678.95
  5. Step 5: Solve for x
    x = 121,906,678.95/9,966.65
  6. Step 6: Final answer
    x = 12,231.47

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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.