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Finding the Fourth Proportional to 8,689.81, 11,991.89 and 4,710.92

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Solution

The fourth proportional to 8,689.81, 11,991.89 and 4,710.92 is: 6,501.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.81 : 11,991.89 = 4,710.92 : x
  2. Step 2: Convert to fraction form
    8,689.81/11,991.89 = 4,710.92/x
  3. Step 3: Cross multiply
    8,689.81x = 11,991.89 × 4,710.92
  4. Step 4: Simplify right side
    8,689.81x = 56,492,786.26
  5. Step 5: Solve for x
    x = 56,492,786.26/8,689.81
  6. Step 6: Final answer
    x = 6,501.04

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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.