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Finding the Fourth Proportional to 6,621.72, 9,920.73 and 4,423.77

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Solution

The fourth proportional to 6,621.72, 9,920.73 and 4,423.77 is: 6,627.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.72 : 9,920.73 = 4,423.77 : x
  2. Step 2: Convert to fraction form
    6,621.72/9,920.73 = 4,423.77/x
  3. Step 3: Cross multiply
    6,621.72x = 9,920.73 × 4,423.77
  4. Step 4: Simplify right side
    6,621.72x = 43,887,027.75
  5. Step 5: Solve for x
    x = 43,887,027.75/6,621.72
  6. Step 6: Final answer
    x = 6,627.74

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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.