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Finding the Fourth Proportional to 8,783.55, 12,122.42 and 5,761.22

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Solution

The fourth proportional to 8,783.55, 12,122.42 and 5,761.22 is: 7,951.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,783.55 : 12,122.42 = 5,761.22 : x
  2. Step 2: Convert to fraction form
    8,783.55/12,122.42 = 5,761.22/x
  3. Step 3: Cross multiply
    8,783.55x = 12,122.42 × 5,761.22
  4. Step 4: Simplify right side
    8,783.55x = 69,839,839.13
  5. Step 5: Solve for x
    x = 69,839,839.13/8,783.55
  6. Step 6: Final answer
    x = 7,951.21

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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.