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Finding the Fourth Proportional to 20,672.02, 30,980.28 and 11,298.02

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Solution

The fourth proportional to 20,672.02, 30,980.28 and 11,298.02 is: 16,931.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.02 : 30,980.28 = 11,298.02 : x
  2. Step 2: Convert to fraction form
    20,672.02/30,980.28 = 11,298.02/x
  3. Step 3: Cross multiply
    20,672.02x = 30,980.28 × 11,298.02
  4. Step 4: Simplify right side
    20,672.02x = 350,015,823.05
  5. Step 5: Solve for x
    x = 350,015,823.05/20,672.02
  6. Step 6: Final answer
    x = 16,931.86

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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.