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Finding the Fourth Proportional to 4,876.76, 6,729.90 and 2,780.84

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Solution

The fourth proportional to 4,876.76, 6,729.90 and 2,780.84 is: 3,837.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,876.76 : 6,729.90 = 2,780.84 : x
  2. Step 2: Convert to fraction form
    4,876.76/6,729.90 = 2,780.84/x
  3. Step 3: Cross multiply
    4,876.76x = 6,729.90 × 2,780.84
  4. Step 4: Simplify right side
    4,876.76x = 18,714,775.12
  5. Step 5: Solve for x
    x = 18,714,775.12/4,876.76
  6. Step 6: Final answer
    x = 3,837.54

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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.