Home / 54,093.29-81,139.05-20,820.58

Finding the Fourth Proportional to 54,093.29, 81,139.05 and 20,820.58

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Solution

The fourth proportional to 54,093.29, 81,139.05 and 20,820.58 is: 31,230.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,093.29 : 81,139.05 = 20,820.58 : x
  2. Step 2: Convert to fraction form
    54,093.29/81,139.05 = 20,820.58/x
  3. Step 3: Cross multiply
    54,093.29x = 81,139.05 × 20,820.58
  4. Step 4: Simplify right side
    54,093.29x = 1,689,361,878.80
  5. Step 5: Solve for x
    x = 1,689,361,878.80/54,093.29
  6. Step 6: Final answer
    x = 31,230.53

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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.