Home / 20,731.98-28,609.89-11,779.29

Finding the Fourth Proportional to 20,731.98, 28,609.89 and 11,779.29

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Solution

The fourth proportional to 20,731.98, 28,609.89 and 11,779.29 is: 16,255.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.98 : 28,609.89 = 11,779.29 : x
  2. Step 2: Convert to fraction form
    20,731.98/28,609.89 = 11,779.29/x
  3. Step 3: Cross multiply
    20,731.98x = 28,609.89 × 11,779.29
  4. Step 4: Simplify right side
    20,731.98x = 337,004,191.18
  5. Step 5: Solve for x
    x = 337,004,191.18/20,731.98
  6. Step 6: Final answer
    x = 16,255.28

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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.