Home / 20,854.89-31,286.95-11,490.09

Finding the Fourth Proportional to 20,854.89, 31,286.95 and 11,490.09

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Solution

The fourth proportional to 20,854.89, 31,286.95 and 11,490.09 is: 17,237.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.89 : 31,286.95 = 11,490.09 : x
  2. Step 2: Convert to fraction form
    20,854.89/31,286.95 = 11,490.09/x
  3. Step 3: Cross multiply
    20,854.89x = 31,286.95 × 11,490.09
  4. Step 4: Simplify right side
    20,854.89x = 359,489,900.05
  5. Step 5: Solve for x
    x = 359,489,900.05/20,854.89
  6. Step 6: Final answer
    x = 17,237.68

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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.