Home / 20,652.20-31,043.10-19,485.80

Finding the Fourth Proportional to 20,652.20, 31,043.10 and 19,485.80

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Solution

The fourth proportional to 20,652.20, 31,043.10 and 19,485.80 is: 29,289.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.20 : 31,043.10 = 19,485.80 : x
  2. Step 2: Convert to fraction form
    20,652.20/31,043.10 = 19,485.80/x
  3. Step 3: Cross multiply
    20,652.20x = 31,043.10 × 19,485.80
  4. Step 4: Simplify right side
    20,652.20x = 604,899,637.98
  5. Step 5: Solve for x
    x = 604,899,637.98/20,652.20
  6. Step 6: Final answer
    x = 29,289.84

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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.