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Finding the Fourth Proportional to 6,921.99, 9,555.77 and 4,270.86

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Solution

The fourth proportional to 6,921.99, 9,555.77 and 4,270.86 is: 5,895.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.99 : 9,555.77 = 4,270.86 : x
  2. Step 2: Convert to fraction form
    6,921.99/9,555.77 = 4,270.86/x
  3. Step 3: Cross multiply
    6,921.99x = 9,555.77 × 4,270.86
  4. Step 4: Simplify right side
    6,921.99x = 40,811,366.54
  5. Step 5: Solve for x
    x = 40,811,366.54/6,921.99
  6. Step 6: Final answer
    x = 5,895.90

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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.