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Finding the Fourth Proportional to 20,362.76, 28,099.08 and 12,404

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Solution

The fourth proportional to 20,362.76, 28,099.08 and 12,404 is: 17,116.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,362.76 : 28,099.08 = 12,404 : x
  2. Step 2: Convert to fraction form
    20,362.76/28,099.08 = 12,404/x
  3. Step 3: Cross multiply
    20,362.76x = 28,099.08 × 12,404
  4. Step 4: Simplify right side
    20,362.76x = 348,540,988.32
  5. Step 5: Solve for x
    x = 348,540,988.32/20,362.76
  6. Step 6: Final answer
    x = 17,116.59

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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.