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Finding the Fourth Proportional to 8,300.78, 11,455.12 and 4,574.78

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Solution

The fourth proportional to 8,300.78, 11,455.12 and 4,574.78 is: 6,313.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,300.78 : 11,455.12 = 4,574.78 : x
  2. Step 2: Convert to fraction form
    8,300.78/11,455.12 = 4,574.78/x
  3. Step 3: Cross multiply
    8,300.78x = 11,455.12 × 4,574.78
  4. Step 4: Simplify right side
    8,300.78x = 52,404,653.87
  5. Step 5: Solve for x
    x = 52,404,653.87/8,300.78
  6. Step 6: Final answer
    x = 6,313.22

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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.