Home / 20,790.84-28,691.30-11,359.48

Finding the Fourth Proportional to 20,790.84, 28,691.30 and 11,359.48

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Solution

The fourth proportional to 20,790.84, 28,691.30 and 11,359.48 is: 15,676.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.84 : 28,691.30 = 11,359.48 : x
  2. Step 2: Convert to fraction form
    20,790.84/28,691.30 = 11,359.48/x
  3. Step 3: Cross multiply
    20,790.84x = 28,691.30 × 11,359.48
  4. Step 4: Simplify right side
    20,790.84x = 325,918,248.52
  5. Step 5: Solve for x
    x = 325,918,248.52/20,790.84
  6. Step 6: Final answer
    x = 15,676.05

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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.