Home / 20,138.68-30,176.97-10,779.94

Finding the Fourth Proportional to 20,138.68, 30,176.97 and 10,779.94

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Solution

The fourth proportional to 20,138.68, 30,176.97 and 10,779.94 is: 16,153.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.68 : 30,176.97 = 10,779.94 : x
  2. Step 2: Convert to fraction form
    20,138.68/30,176.97 = 10,779.94/x
  3. Step 3: Cross multiply
    20,138.68x = 30,176.97 × 10,779.94
  4. Step 4: Simplify right side
    20,138.68x = 325,305,925.98
  5. Step 5: Solve for x
    x = 325,305,925.98/20,138.68
  6. Step 6: Final answer
    x = 16,153.29

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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.