Home / 20,553.72-30,830.10-11,782.20

Finding the Fourth Proportional to 20,553.72, 30,830.10 and 11,782.20

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Solution

The fourth proportional to 20,553.72, 30,830.10 and 11,782.20 is: 17,673.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.72 : 30,830.10 = 11,782.20 : x
  2. Step 2: Convert to fraction form
    20,553.72/30,830.10 = 11,782.20/x
  3. Step 3: Cross multiply
    20,553.72x = 30,830.10 × 11,782.20
  4. Step 4: Simplify right side
    20,553.72x = 363,246,404.22
  5. Step 5: Solve for x
    x = 363,246,404.22/20,553.72
  6. Step 6: Final answer
    x = 17,673.02

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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.