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Finding the Fourth Proportional to 7,205.71, 9,943.41 and 4,220.86

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Solution

The fourth proportional to 7,205.71, 9,943.41 and 4,220.86 is: 5,824.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,205.71 : 9,943.41 = 4,220.86 : x
  2. Step 2: Convert to fraction form
    7,205.71/9,943.41 = 4,220.86/x
  3. Step 3: Cross multiply
    7,205.71x = 9,943.41 × 4,220.86
  4. Step 4: Simplify right side
    7,205.71x = 41,969,741.53
  5. Step 5: Solve for x
    x = 41,969,741.53/7,205.71
  6. Step 6: Final answer
    x = 5,824.51

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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.