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Finding the Fourth Proportional to 7,847.02, 10,815.42 and 7,477.93

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Solution

The fourth proportional to 7,847.02, 10,815.42 and 7,477.93 is: 10,306.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,847.02 : 10,815.42 = 7,477.93 : x
  2. Step 2: Convert to fraction form
    7,847.02/10,815.42 = 7,477.93/x
  3. Step 3: Cross multiply
    7,847.02x = 10,815.42 × 7,477.93
  4. Step 4: Simplify right side
    7,847.02x = 80,876,953.68
  5. Step 5: Solve for x
    x = 80,876,953.68/7,847.02
  6. Step 6: Final answer
    x = 10,306.71

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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.