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Finding the Fourth Proportional to 6,420.47, 8,826.23 and 5,520.91

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Solution

The fourth proportional to 6,420.47, 8,826.23 and 5,520.91 is: 7,589.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.47 : 8,826.23 = 5,520.91 : x
  2. Step 2: Convert to fraction form
    6,420.47/8,826.23 = 5,520.91/x
  3. Step 3: Cross multiply
    6,420.47x = 8,826.23 × 5,520.91
  4. Step 4: Simplify right side
    6,420.47x = 48,728,793.86
  5. Step 5: Solve for x
    x = 48,728,793.86/6,420.47
  6. Step 6: Final answer
    x = 7,589.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.