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Finding the Fourth Proportional to 28,107.80, 42,161.70 and 16,281.80

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Solution

The fourth proportional to 28,107.80, 42,161.70 and 16,281.80 is: 24,422.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.80 : 42,161.70 = 16,281.80 : x
  2. Step 2: Convert to fraction form
    28,107.80/42,161.70 = 16,281.80/x
  3. Step 3: Cross multiply
    28,107.80x = 42,161.70 × 16,281.80
  4. Step 4: Simplify right side
    28,107.80x = 686,468,367.06
  5. Step 5: Solve for x
    x = 686,468,367.06/28,107.80
  6. Step 6: Final answer
    x = 24,422.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.