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Finding the Fourth Proportional to 15,991.99, 22,069.04 and 9,281.61

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Solution

The fourth proportional to 15,991.99, 22,069.04 and 9,281.61 is: 12,808.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.99 : 22,069.04 = 9,281.61 : x
  2. Step 2: Convert to fraction form
    15,991.99/22,069.04 = 9,281.61/x
  3. Step 3: Cross multiply
    15,991.99x = 22,069.04 × 9,281.61
  4. Step 4: Simplify right side
    15,991.99x = 204,836,175.95
  5. Step 5: Solve for x
    x = 204,836,175.95/15,991.99
  6. Step 6: Final answer
    x = 12,808.68

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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.