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Finding the Fourth Proportional to 7,793.10, 11,688.90 and 3,111.87

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Solution

The fourth proportional to 7,793.10, 11,688.90 and 3,111.87 is: 4,667.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,793.10 : 11,688.90 = 3,111.87 : x
  2. Step 2: Convert to fraction form
    7,793.10/11,688.90 = 3,111.87/x
  3. Step 3: Cross multiply
    7,793.10x = 11,688.90 × 3,111.87
  4. Step 4: Simplify right side
    7,793.10x = 36,374,337.24
  5. Step 5: Solve for x
    x = 36,374,337.24/7,793.10
  6. Step 6: Final answer
    x = 4,667.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.