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Finding the Fourth Proportional to 6,155.56, 8,475.78 and 5,660.20

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Solution

The fourth proportional to 6,155.56, 8,475.78 and 5,660.20 is: 7,793.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,155.56 : 8,475.78 = 5,660.20 : x
  2. Step 2: Convert to fraction form
    6,155.56/8,475.78 = 5,660.20/x
  3. Step 3: Cross multiply
    6,155.56x = 8,475.78 × 5,660.20
  4. Step 4: Simplify right side
    6,155.56x = 47,974,609.96
  5. Step 5: Solve for x
    x = 47,974,609.96/6,155.56
  6. Step 6: Final answer
    x = 7,793.70

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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.