Home / 20,899.31-28,841.04-11,947.01

Finding the Fourth Proportional to 20,899.31, 28,841.04 and 11,947.01

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Solution

The fourth proportional to 20,899.31, 28,841.04 and 11,947.01 is: 16,486.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.31 : 28,841.04 = 11,947.01 : x
  2. Step 2: Convert to fraction form
    20,899.31/28,841.04 = 11,947.01/x
  3. Step 3: Cross multiply
    20,899.31x = 28,841.04 × 11,947.01
  4. Step 4: Simplify right side
    20,899.31x = 344,564,049.09
  5. Step 5: Solve for x
    x = 344,564,049.09/20,899.31
  6. Step 6: Final answer
    x = 16,486.86

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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.