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Finding the Fourth Proportional to 8,783.72, 12,113.44 and 5,757.74

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Solution

The fourth proportional to 8,783.72, 12,113.44 and 5,757.74 is: 7,940.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,783.72 : 12,113.44 = 5,757.74 : x
  2. Step 2: Convert to fraction form
    8,783.72/12,113.44 = 5,757.74/x
  3. Step 3: Cross multiply
    8,783.72x = 12,113.44 × 5,757.74
  4. Step 4: Simplify right side
    8,783.72x = 69,745,963.06
  5. Step 5: Solve for x
    x = 69,745,963.06/8,783.72
  6. Step 6: Final answer
    x = 7,940.37

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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.