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Finding the Fourth Proportional to 6,620.76, 9,911.70 and 5,224.32

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Solution

The fourth proportional to 6,620.76, 9,911.70 and 5,224.32 is: 7,821.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.76 : 9,911.70 = 5,224.32 : x
  2. Step 2: Convert to fraction form
    6,620.76/9,911.70 = 5,224.32/x
  3. Step 3: Cross multiply
    6,620.76x = 9,911.70 × 5,224.32
  4. Step 4: Simplify right side
    6,620.76x = 51,781,892.54
  5. Step 5: Solve for x
    x = 51,781,892.54/6,620.76
  6. Step 6: Final answer
    x = 7,821.14

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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.