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Finding the Fourth Proportional to 20,447.70, 30,671.55 and 18,309.30

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Solution

The fourth proportional to 20,447.70, 30,671.55 and 18,309.30 is: 27,463.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.70 : 30,671.55 = 18,309.30 : x
  2. Step 2: Convert to fraction form
    20,447.70/30,671.55 = 18,309.30/x
  3. Step 3: Cross multiply
    20,447.70x = 30,671.55 × 18,309.30
  4. Step 4: Simplify right side
    20,447.70x = 561,574,610.42
  5. Step 5: Solve for x
    x = 561,574,610.42/20,447.70
  6. Step 6: Final answer
    x = 27,463.95

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1.5x scale

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.