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Finding the Fourth Proportional to 9,990.26, 13,752.69 and 8,584.82

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Solution

The fourth proportional to 9,990.26, 13,752.69 and 8,584.82 is: 11,817.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.26 : 13,752.69 = 8,584.82 : x
  2. Step 2: Convert to fraction form
    9,990.26/13,752.69 = 8,584.82/x
  3. Step 3: Cross multiply
    9,990.26x = 13,752.69 × 8,584.82
  4. Step 4: Simplify right side
    9,990.26x = 118,064,368.17
  5. Step 5: Solve for x
    x = 118,064,368.17/9,990.26
  6. Step 6: Final answer
    x = 11,817.95

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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.