Home / 20,817.33-28,730.65-11,862.78

Finding the Fourth Proportional to 20,817.33, 28,730.65 and 11,862.78

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Solution

The fourth proportional to 20,817.33, 28,730.65 and 11,862.78 is: 16,372.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.33 : 28,730.65 = 11,862.78 : x
  2. Step 2: Convert to fraction form
    20,817.33/28,730.65 = 11,862.78/x
  3. Step 3: Cross multiply
    20,817.33x = 28,730.65 × 11,862.78
  4. Step 4: Simplify right side
    20,817.33x = 340,825,177.24
  5. Step 5: Solve for x
    x = 340,825,177.24/20,817.33
  6. Step 6: Final answer
    x = 16,372.19

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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.