Home / 20,899.32-28,840.62-11,947.32

Finding the Fourth Proportional to 20,899.32, 28,840.62 and 11,947.32

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Solution

The fourth proportional to 20,899.32, 28,840.62 and 11,947.32 is: 16,487.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.32 : 28,840.62 = 11,947.32 : x
  2. Step 2: Convert to fraction form
    20,899.32/28,840.62 = 11,947.32/x
  3. Step 3: Cross multiply
    20,899.32x = 28,840.62 × 11,947.32
  4. Step 4: Simplify right side
    20,899.32x = 344,568,116.14
  5. Step 5: Solve for x
    x = 344,568,116.14/20,899.32
  6. Step 6: Final answer
    x = 16,487.05

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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.