Home / 20,900.61-31,297.38-11,530.21

Finding the Fourth Proportional to 20,900.61, 31,297.38 and 11,530.21

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Solution

The fourth proportional to 20,900.61, 31,297.38 and 11,530.21 is: 17,265.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.61 : 31,297.38 = 11,530.21 : x
  2. Step 2: Convert to fraction form
    20,900.61/31,297.38 = 11,530.21/x
  3. Step 3: Cross multiply
    20,900.61x = 31,297.38 × 11,530.21
  4. Step 4: Simplify right side
    20,900.61x = 360,865,363.85
  5. Step 5: Solve for x
    x = 360,865,363.85/20,900.61
  6. Step 6: Final answer
    x = 17,265.78

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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.