Home / 20,102.70-30,167.37-8,415.90

Finding the Fourth Proportional to 20,102.70, 30,167.37 and 8,415.90

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Solution

The fourth proportional to 20,102.70, 30,167.37 and 8,415.90 is: 12,629.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.70 : 30,167.37 = 8,415.90 : x
  2. Step 2: Convert to fraction form
    20,102.70/30,167.37 = 8,415.90/x
  3. Step 3: Cross multiply
    20,102.70x = 30,167.37 × 8,415.90
  4. Step 4: Simplify right side
    20,102.70x = 253,885,569.18
  5. Step 5: Solve for x
    x = 253,885,569.18/20,102.70
  6. Step 6: Final answer
    x = 12,629.43

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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.