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Finding the Fourth Proportional to 8,665.89, 11,957.91 and 4,889.11

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Solution

The fourth proportional to 8,665.89, 11,957.91 and 4,889.11 is: 6,746.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.89 : 11,957.91 = 4,889.11 : x
  2. Step 2: Convert to fraction form
    8,665.89/11,957.91 = 4,889.11/x
  3. Step 3: Cross multiply
    8,665.89x = 11,957.91 × 4,889.11
  4. Step 4: Simplify right side
    8,665.89x = 58,463,537.36
  5. Step 5: Solve for x
    x = 58,463,537.36/8,665.89
  6. Step 6: Final answer
    x = 6,746.40

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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.