Home / 20,830.36-31,231.68-11,474.78

Finding the Fourth Proportional to 20,830.36, 31,231.68 and 11,474.78

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Solution

The fourth proportional to 20,830.36, 31,231.68 and 11,474.78 is: 17,204.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.36 : 31,231.68 = 11,474.78 : x
  2. Step 2: Convert to fraction form
    20,830.36/31,231.68 = 11,474.78/x
  3. Step 3: Cross multiply
    20,830.36x = 31,231.68 × 11,474.78
  4. Step 4: Simplify right side
    20,830.36x = 358,376,657.03
  5. Step 5: Solve for x
    x = 358,376,657.03/20,830.36
  6. Step 6: Final answer
    x = 17,204.53

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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.