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Finding the Fourth Proportional to 8,700.81, 11,993.09 and 6,809.34

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Solution

The fourth proportional to 8,700.81, 11,993.09 and 6,809.34 is: 9,385.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.81 : 11,993.09 = 6,809.34 : x
  2. Step 2: Convert to fraction form
    8,700.81/11,993.09 = 6,809.34/x
  3. Step 3: Cross multiply
    8,700.81x = 11,993.09 × 6,809.34
  4. Step 4: Simplify right side
    8,700.81x = 81,665,027.46
  5. Step 5: Solve for x
    x = 81,665,027.46/8,700.81
  6. Step 6: Final answer
    x = 9,385.91

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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.