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Finding the Fourth Proportional to 8,665.72, 11,958.80 and 5,261.76

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Solution

The fourth proportional to 8,665.72, 11,958.80 and 5,261.76 is: 7,261.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.72 : 11,958.80 = 5,261.76 : x
  2. Step 2: Convert to fraction form
    8,665.72/11,958.80 = 5,261.76/x
  3. Step 3: Cross multiply
    8,665.72x = 11,958.80 × 5,261.76
  4. Step 4: Simplify right side
    8,665.72x = 62,924,309.18
  5. Step 5: Solve for x
    x = 62,924,309.18/8,665.72
  6. Step 6: Final answer
    x = 7,261.29

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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.