Home / 20,899.32-28,839.96-11,945.64

Finding the Fourth Proportional to 20,899.32, 28,839.96 and 11,945.64

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Solution

The fourth proportional to 20,899.32, 28,839.96 and 11,945.64 is: 16,484.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.32 : 28,839.96 = 11,945.64 : x
  2. Step 2: Convert to fraction form
    20,899.32/28,839.96 = 11,945.64/x
  3. Step 3: Cross multiply
    20,899.32x = 28,839.96 × 11,945.64
  4. Step 4: Simplify right side
    20,899.32x = 344,511,779.77
  5. Step 5: Solve for x
    x = 344,511,779.77/20,899.32
  6. Step 6: Final answer
    x = 16,484.35

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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.