Home / 20,835.62-31,239.50-11,480.12

Finding the Fourth Proportional to 20,835.62, 31,239.50 and 11,480.12

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Solution

The fourth proportional to 20,835.62, 31,239.50 and 11,480.12 is: 17,212.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.62 : 31,239.50 = 11,480.12 : x
  2. Step 2: Convert to fraction form
    20,835.62/31,239.50 = 11,480.12/x
  3. Step 3: Cross multiply
    20,835.62x = 31,239.50 × 11,480.12
  4. Step 4: Simplify right side
    20,835.62x = 358,632,995.14
  5. Step 5: Solve for x
    x = 358,632,995.14/20,835.62
  6. Step 6: Final answer
    x = 17,212.50

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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.