Home / 20,209.40-27,890.76-11,256.68

Finding the Fourth Proportional to 20,209.40, 27,890.76 and 11,256.68

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Solution

The fourth proportional to 20,209.40, 27,890.76 and 11,256.68 is: 15,535.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.40 : 27,890.76 = 11,256.68 : x
  2. Step 2: Convert to fraction form
    20,209.40/27,890.76 = 11,256.68/x
  3. Step 3: Cross multiply
    20,209.40x = 27,890.76 × 11,256.68
  4. Step 4: Simplify right side
    20,209.40x = 313,957,360.28
  5. Step 5: Solve for x
    x = 313,957,360.28/20,209.40
  6. Step 6: Final answer
    x = 15,535.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.