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Finding the Fourth Proportional to 5,056.79, 6,978.12 and 2,818.85

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Solution

The fourth proportional to 5,056.79, 6,978.12 and 2,818.85 is: 3,889.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,056.79 : 6,978.12 = 2,818.85 : x
  2. Step 2: Convert to fraction form
    5,056.79/6,978.12 = 2,818.85/x
  3. Step 3: Cross multiply
    5,056.79x = 6,978.12 × 2,818.85
  4. Step 4: Simplify right side
    5,056.79x = 19,670,273.56
  5. Step 5: Solve for x
    x = 19,670,273.56/5,056.79
  6. Step 6: Final answer
    x = 3,889.87

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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.