Home / 20,820.12-31,037.37-20,500.44

Finding the Fourth Proportional to 20,820.12, 31,037.37 and 20,500.44

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Solution

The fourth proportional to 20,820.12, 31,037.37 and 20,500.44 is: 30,560.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.12 : 31,037.37 = 20,500.44 : x
  2. Step 2: Convert to fraction form
    20,820.12/31,037.37 = 20,500.44/x
  3. Step 3: Cross multiply
    20,820.12x = 31,037.37 × 20,500.44
  4. Step 4: Simplify right side
    20,820.12x = 636,279,741.44
  5. Step 5: Solve for x
    x = 636,279,741.44/20,820.12
  6. Step 6: Final answer
    x = 30,560.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.