Home / 20,660.50-31,103.16-18,823.42

Finding the Fourth Proportional to 20,660.50, 31,103.16 and 18,823.42

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Solution

The fourth proportional to 20,660.50, 31,103.16 and 18,823.42 is: 28,337.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.50 : 31,103.16 = 18,823.42 : x
  2. Step 2: Convert to fraction form
    20,660.50/31,103.16 = 18,823.42/x
  3. Step 3: Cross multiply
    20,660.50x = 31,103.16 × 18,823.42
  4. Step 4: Simplify right side
    20,660.50x = 585,467,844.01
  5. Step 5: Solve for x
    x = 585,467,844.01/20,660.50
  6. Step 6: Final answer
    x = 28,337.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.