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Finding the Fourth Proportional to 6,688.99, 9,231.39 and 5,697.55

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Solution

The fourth proportional to 6,688.99, 9,231.39 and 5,697.55 is: 7,863.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,688.99 : 9,231.39 = 5,697.55 : x
  2. Step 2: Convert to fraction form
    6,688.99/9,231.39 = 5,697.55/x
  3. Step 3: Cross multiply
    6,688.99x = 9,231.39 × 5,697.55
  4. Step 4: Simplify right side
    6,688.99x = 52,596,231.45
  5. Step 5: Solve for x
    x = 52,596,231.45/6,688.99
  6. Step 6: Final answer
    x = 7,863.11

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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.