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Finding the Fourth Proportional to 28,197.80, 42,296.70 and 8,477.90

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Solution

The fourth proportional to 28,197.80, 42,296.70 and 8,477.90 is: 12,716.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,197.80 : 42,296.70 = 8,477.90 : x
  2. Step 2: Convert to fraction form
    28,197.80/42,296.70 = 8,477.90/x
  3. Step 3: Cross multiply
    28,197.80x = 42,296.70 × 8,477.90
  4. Step 4: Simplify right side
    28,197.80x = 358,587,192.93
  5. Step 5: Solve for x
    x = 358,587,192.93/28,197.80
  6. Step 6: Final answer
    x = 12,716.85

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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.