Home / 20,842.18-28,761.16-11,889.36

Finding the Fourth Proportional to 20,842.18, 28,761.16 and 11,889.36

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Solution

The fourth proportional to 20,842.18, 28,761.16 and 11,889.36 is: 16,406.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.18 : 28,761.16 = 11,889.36 : x
  2. Step 2: Convert to fraction form
    20,842.18/28,761.16 = 11,889.36/x
  3. Step 3: Cross multiply
    20,842.18x = 28,761.16 × 11,889.36
  4. Step 4: Simplify right side
    20,842.18x = 341,951,785.26
  5. Step 5: Solve for x
    x = 341,951,785.26/20,842.18
  6. Step 6: Final answer
    x = 16,406.72

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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.