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Finding the Fourth Proportional to 8,345.75, 11,455.79 and 7,380.41

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Solution

The fourth proportional to 8,345.75, 11,455.79 and 7,380.41 is: 10,130.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,345.75 : 11,455.79 = 7,380.41 : x
  2. Step 2: Convert to fraction form
    8,345.75/11,455.79 = 7,380.41/x
  3. Step 3: Cross multiply
    8,345.75x = 11,455.79 × 7,380.41
  4. Step 4: Simplify right side
    8,345.75x = 84,548,332.89
  5. Step 5: Solve for x
    x = 84,548,332.89/8,345.75
  6. Step 6: Final answer
    x = 10,130.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.