Home / 20,742.82-31,037.66-12,428.70

Finding the Fourth Proportional to 20,742.82, 31,037.66 and 12,428.70

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Solution

The fourth proportional to 20,742.82, 31,037.66 and 12,428.70 is: 18,597.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.82 : 31,037.66 = 12,428.70 : x
  2. Step 2: Convert to fraction form
    20,742.82/31,037.66 = 12,428.70/x
  3. Step 3: Cross multiply
    20,742.82x = 31,037.66 × 12,428.70
  4. Step 4: Simplify right side
    20,742.82x = 385,757,764.84
  5. Step 5: Solve for x
    x = 385,757,764.84/20,742.82
  6. Step 6: Final answer
    x = 18,597.17

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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.