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Finding the Fourth Proportional to 6,458.76, 8,910.80 and 4,221.93

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Solution

The fourth proportional to 6,458.76, 8,910.80 and 4,221.93 is: 5,824.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,458.76 : 8,910.80 = 4,221.93 : x
  2. Step 2: Convert to fraction form
    6,458.76/8,910.80 = 4,221.93/x
  3. Step 3: Cross multiply
    6,458.76x = 8,910.80 × 4,221.93
  4. Step 4: Simplify right side
    6,458.76x = 37,620,752.73
  5. Step 5: Solve for x
    x = 37,620,752.73/6,458.76
  6. Step 6: Final answer
    x = 5,824.76

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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.