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Finding the Fourth Proportional to 8,687.04, 11,990.88 and 5,551.68

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Solution

The fourth proportional to 8,687.04, 11,990.88 and 5,551.68 is: 7,663.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.04 : 11,990.88 = 5,551.68 : x
  2. Step 2: Convert to fraction form
    8,687.04/11,990.88 = 5,551.68/x
  3. Step 3: Cross multiply
    8,687.04x = 11,990.88 × 5,551.68
  4. Step 4: Simplify right side
    8,687.04x = 66,569,528.68
  5. Step 5: Solve for x
    x = 66,569,528.68/8,687.04
  6. Step 6: Final answer
    x = 7,663.09

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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.