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Finding the Fourth Proportional to 20,436, 30,626.28 and 9,328.92

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Solution

The fourth proportional to 20,436, 30,626.28 and 9,328.92 is: 13,980.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,436 : 30,626.28 = 9,328.92 : x
  2. Step 2: Convert to fraction form
    20,436/30,626.28 = 9,328.92/x
  3. Step 3: Cross multiply
    20,436x = 30,626.28 × 9,328.92
  4. Step 4: Simplify right side
    20,436x = 285,710,116.02
  5. Step 5: Solve for x
    x = 285,710,116.02/20,436
  6. Step 6: Final answer
    x = 13,980.73

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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.