Home / 4,876.70-6,728.55-2,780.78

Finding the Fourth Proportional to 4,876.70, 6,728.55 and 2,780.78

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Solution

The fourth proportional to 4,876.70, 6,728.55 and 2,780.78 is: 3,836.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,876.70 : 6,728.55 = 2,780.78 : x
  2. Step 2: Convert to fraction form
    4,876.70/6,728.55 = 2,780.78/x
  3. Step 3: Cross multiply
    4,876.70x = 6,728.55 × 2,780.78
  4. Step 4: Simplify right side
    4,876.70x = 18,710,617.27
  5. Step 5: Solve for x
    x = 18,710,617.27/4,876.70
  6. Step 6: Final answer
    x = 3,836.74

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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.