Home / 20,731.10-28,608.80-11,299.58

Finding the Fourth Proportional to 20,731.10, 28,608.80 and 11,299.58

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Solution

The fourth proportional to 20,731.10, 28,608.80 and 11,299.58 is: 15,593.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.10 : 28,608.80 = 11,299.58 : x
  2. Step 2: Convert to fraction form
    20,731.10/28,608.80 = 11,299.58/x
  3. Step 3: Cross multiply
    20,731.10x = 28,608.80 × 11,299.58
  4. Step 4: Simplify right side
    20,731.10x = 323,267,424.30
  5. Step 5: Solve for x
    x = 323,267,424.30/20,731.10
  6. Step 6: Final answer
    x = 15,593.36

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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.