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Finding the Fourth Proportional to 8,665.80, 11,958.80 and 4,686.91

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Solution

The fourth proportional to 8,665.80, 11,958.80 and 4,686.91 is: 6,467.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.80 : 11,958.80 = 4,686.91 : x
  2. Step 2: Convert to fraction form
    8,665.80/11,958.80 = 4,686.91/x
  3. Step 3: Cross multiply
    8,665.80x = 11,958.80 × 4,686.91
  4. Step 4: Simplify right side
    8,665.80x = 56,049,801.13
  5. Step 5: Solve for x
    x = 56,049,801.13/8,665.80
  6. Step 6: Final answer
    x = 6,467.93

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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.