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Finding the Fourth Proportional to 28,019.80, 42,029.70 and 16,193.80

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Solution

The fourth proportional to 28,019.80, 42,029.70 and 16,193.80 is: 24,290.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,019.80 : 42,029.70 = 16,193.80 : x
  2. Step 2: Convert to fraction form
    28,019.80/42,029.70 = 16,193.80/x
  3. Step 3: Cross multiply
    28,019.80x = 42,029.70 × 16,193.80
  4. Step 4: Simplify right side
    28,019.80x = 680,620,555.86
  5. Step 5: Solve for x
    x = 680,620,555.86/28,019.80
  6. Step 6: Final answer
    x = 24,290.70

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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.