Home / 20,123.48-30,178.20-8,273.90

Finding the Fourth Proportional to 20,123.48, 30,178.20 and 8,273.90

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Solution

The fourth proportional to 20,123.48, 30,178.20 and 8,273.90 is: 12,407.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.48 : 30,178.20 = 8,273.90 : x
  2. Step 2: Convert to fraction form
    20,123.48/30,178.20 = 8,273.90/x
  3. Step 3: Cross multiply
    20,123.48x = 30,178.20 × 8,273.90
  4. Step 4: Simplify right side
    20,123.48x = 249,691,408.98
  5. Step 5: Solve for x
    x = 249,691,408.98/20,123.48
  6. Step 6: Final answer
    x = 12,407.96

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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.