Home / 20,843.56-28,765.76-11,889.01

Finding the Fourth Proportional to 20,843.56, 28,765.76 and 11,889.01

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Solution

The fourth proportional to 20,843.56, 28,765.76 and 11,889.01 is: 16,407.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,843.56 : 28,765.76 = 11,889.01 : x
  2. Step 2: Convert to fraction form
    20,843.56/28,765.76 = 11,889.01/x
  3. Step 3: Cross multiply
    20,843.56x = 28,765.76 × 11,889.01
  4. Step 4: Simplify right side
    20,843.56x = 341,996,276.94
  5. Step 5: Solve for x
    x = 341,996,276.94/20,843.56
  6. Step 6: Final answer
    x = 16,407.77

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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.