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Finding the Fourth Proportional to 5,321.72, 7,983.40 and 2,400.86

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Solution

The fourth proportional to 5,321.72, 7,983.40 and 2,400.86 is: 3,601.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.72 : 7,983.40 = 2,400.86 : x
  2. Step 2: Convert to fraction form
    5,321.72/7,983.40 = 2,400.86/x
  3. Step 3: Cross multiply
    5,321.72x = 7,983.40 × 2,400.86
  4. Step 4: Simplify right side
    5,321.72x = 19,167,025.72
  5. Step 5: Solve for x
    x = 19,167,025.72/5,321.72
  6. Step 6: Final answer
    x = 3,601.66

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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.