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Finding the Fourth Proportional to 21,508.62, 32,211.01 and 12,935.41

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Solution

The fourth proportional to 21,508.62, 32,211.01 and 12,935.41 is: 19,371.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,508.62 : 32,211.01 = 12,935.41 : x
  2. Step 2: Convert to fraction form
    21,508.62/32,211.01 = 12,935.41/x
  3. Step 3: Cross multiply
    21,508.62x = 32,211.01 × 12,935.41
  4. Step 4: Simplify right side
    21,508.62x = 416,662,459.81
  5. Step 5: Solve for x
    x = 416,662,459.81/21,508.62
  6. Step 6: Final answer
    x = 19,371.89

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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.