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Finding the Fourth Proportional to 6,981.08, 9,642.44 and 5,220.52

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Solution

The fourth proportional to 6,981.08, 9,642.44 and 5,220.52 is: 7,210.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,981.08 : 9,642.44 = 5,220.52 : x
  2. Step 2: Convert to fraction form
    6,981.08/9,642.44 = 5,220.52/x
  3. Step 3: Cross multiply
    6,981.08x = 9,642.44 × 5,220.52
  4. Step 4: Simplify right side
    6,981.08x = 50,338,550.87
  5. Step 5: Solve for x
    x = 50,338,550.87/6,981.08
  6. Step 6: Final answer
    x = 7,210.71

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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.