Home / 21,558.08-32,304.68-12,188

Finding the Fourth Proportional to 21,558.08, 32,304.68 and 12,188

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Solution

The fourth proportional to 21,558.08, 32,304.68 and 12,188 is: 18,263.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,558.08 : 32,304.68 = 12,188 : x
  2. Step 2: Convert to fraction form
    21,558.08/32,304.68 = 12,188/x
  3. Step 3: Cross multiply
    21,558.08x = 32,304.68 × 12,188
  4. Step 4: Simplify right side
    21,558.08x = 393,729,439.84
  5. Step 5: Solve for x
    x = 393,729,439.84/21,558.08
  6. Step 6: Final answer
    x = 18,263.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.