Home / 20,898.80-31,348.20-18,825.20

Finding the Fourth Proportional to 20,898.80, 31,348.20 and 18,825.20

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Solution

The fourth proportional to 20,898.80, 31,348.20 and 18,825.20 is: 28,237.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.80 : 31,348.20 = 18,825.20 : x
  2. Step 2: Convert to fraction form
    20,898.80/31,348.20 = 18,825.20/x
  3. Step 3: Cross multiply
    20,898.80x = 31,348.20 × 18,825.20
  4. Step 4: Simplify right side
    20,898.80x = 590,136,134.64
  5. Step 5: Solve for x
    x = 590,136,134.64/20,898.80
  6. Step 6: Final answer
    x = 28,237.80

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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.