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Finding the Fourth Proportional to 7,821.80, 10,793.94 and 4,284.92

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Solution

The fourth proportional to 7,821.80, 10,793.94 and 4,284.92 is: 5,913.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.80 : 10,793.94 = 4,284.92 : x
  2. Step 2: Convert to fraction form
    7,821.80/10,793.94 = 4,284.92/x
  3. Step 3: Cross multiply
    7,821.80x = 10,793.94 × 4,284.92
  4. Step 4: Simplify right side
    7,821.80x = 46,251,169.38
  5. Step 5: Solve for x
    x = 46,251,169.38/7,821.80
  6. Step 6: Final answer
    x = 5,913.11

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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.