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Finding the Fourth Proportional to 6,456.78, 8,909.80 and 3,623.76

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Solution

The fourth proportional to 6,456.78, 8,909.80 and 3,623.76 is: 5,000.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,456.78 : 8,909.80 = 3,623.76 : x
  2. Step 2: Convert to fraction form
    6,456.78/8,909.80 = 3,623.76/x
  3. Step 3: Cross multiply
    6,456.78x = 8,909.80 × 3,623.76
  4. Step 4: Simplify right side
    6,456.78x = 32,286,976.85
  5. Step 5: Solve for x
    x = 32,286,976.85/6,456.78
  6. Step 6: Final answer
    x = 5,000.48

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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.