Home / 20,147.40-30,221.10-19,855.80

Finding the Fourth Proportional to 20,147.40, 30,221.10 and 19,855.80

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Solution

The fourth proportional to 20,147.40, 30,221.10 and 19,855.80 is: 29,783.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.40 : 30,221.10 = 19,855.80 : x
  2. Step 2: Convert to fraction form
    20,147.40/30,221.10 = 19,855.80/x
  3. Step 3: Cross multiply
    20,147.40x = 30,221.10 × 19,855.80
  4. Step 4: Simplify right side
    20,147.40x = 600,064,117.38
  5. Step 5: Solve for x
    x = 600,064,117.38/20,147.40
  6. Step 6: Final answer
    x = 29,783.70

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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.