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Finding the Fourth Proportional to 15,990.80, 22,067.52 and 9,276.80

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Solution

The fourth proportional to 15,990.80, 22,067.52 and 9,276.80 is: 12,802.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,990.80 : 22,067.52 = 9,276.80 : x
  2. Step 2: Convert to fraction form
    15,990.80/22,067.52 = 9,276.80/x
  3. Step 3: Cross multiply
    15,990.80x = 22,067.52 × 9,276.80
  4. Step 4: Simplify right side
    15,990.80x = 204,715,969.54
  5. Step 5: Solve for x
    x = 204,715,969.54/15,990.80
  6. Step 6: Final answer
    x = 12,802.11

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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.