Home / 20,985.33-28,959.86-11,553.88

Finding the Fourth Proportional to 20,985.33, 28,959.86 and 11,553.88

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Solution

The fourth proportional to 20,985.33, 28,959.86 and 11,553.88 is: 15,944.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.33 : 28,959.86 = 11,553.88 : x
  2. Step 2: Convert to fraction form
    20,985.33/28,959.86 = 11,553.88/x
  3. Step 3: Cross multiply
    20,985.33x = 28,959.86 × 11,553.88
  4. Step 4: Simplify right side
    20,985.33x = 334,598,747.26
  5. Step 5: Solve for x
    x = 334,598,747.26/20,985.33
  6. Step 6: Final answer
    x = 15,944.41

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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.