Home / 20,820.11-31,202.98-18,181.35

Finding the Fourth Proportional to 20,820.11, 31,202.98 and 18,181.35

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Solution

The fourth proportional to 20,820.11, 31,202.98 and 18,181.35 is: 27,248.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.11 : 31,202.98 = 18,181.35 : x
  2. Step 2: Convert to fraction form
    20,820.11/31,202.98 = 18,181.35/x
  3. Step 3: Cross multiply
    20,820.11x = 31,202.98 × 18,181.35
  4. Step 4: Simplify right side
    20,820.11x = 567,312,254.97
  5. Step 5: Solve for x
    x = 567,312,254.97/20,820.11
  6. Step 6: Final answer
    x = 27,248.29

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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.