Home / 20,735.40-31,103.10-20,443.80

Finding the Fourth Proportional to 20,735.40, 31,103.10 and 20,443.80

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Solution

The fourth proportional to 20,735.40, 31,103.10 and 20,443.80 is: 30,665.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,735.40 : 31,103.10 = 20,443.80 : x
  2. Step 2: Convert to fraction form
    20,735.40/31,103.10 = 20,443.80/x
  3. Step 3: Cross multiply
    20,735.40x = 31,103.10 × 20,443.80
  4. Step 4: Simplify right side
    20,735.40x = 635,865,555.78
  5. Step 5: Solve for x
    x = 635,865,555.78/20,735.40
  6. Step 6: Final answer
    x = 30,665.70

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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.