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Finding the Fourth Proportional to 8,689.58, 11,991.68 and 4,710.75

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Solution

The fourth proportional to 8,689.58, 11,991.68 and 4,710.75 is: 6,500.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.58 : 11,991.68 = 4,710.75 : x
  2. Step 2: Convert to fraction form
    8,689.58/11,991.68 = 4,710.75/x
  3. Step 3: Cross multiply
    8,689.58x = 11,991.68 × 4,710.75
  4. Step 4: Simplify right side
    8,689.58x = 56,489,783.01
  5. Step 5: Solve for x
    x = 56,489,783.01/8,689.58
  6. Step 6: Final answer
    x = 6,500.87

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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.