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Finding the Fourth Proportional to 16,065.80, 22,168.80 and 8,990.48

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Solution

The fourth proportional to 16,065.80, 22,168.80 and 8,990.48 is: 12,405.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,065.80 : 22,168.80 = 8,990.48 : x
  2. Step 2: Convert to fraction form
    16,065.80/22,168.80 = 8,990.48/x
  3. Step 3: Cross multiply
    16,065.80x = 22,168.80 × 8,990.48
  4. Step 4: Simplify right side
    16,065.80x = 199,308,153.02
  5. Step 5: Solve for x
    x = 199,308,153.02/16,065.80
  6. Step 6: Final answer
    x = 12,405.74

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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.