Home / 20,478.96-30,779.01-16,991.58

Finding the Fourth Proportional to 20,478.96, 30,779.01 and 16,991.58

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Solution

The fourth proportional to 20,478.96, 30,779.01 and 16,991.58 is: 25,537.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.96 : 30,779.01 = 16,991.58 : x
  2. Step 2: Convert to fraction form
    20,478.96/30,779.01 = 16,991.58/x
  3. Step 3: Cross multiply
    20,478.96x = 30,779.01 × 16,991.58
  4. Step 4: Simplify right side
    20,478.96x = 522,984,010.74
  5. Step 5: Solve for x
    x = 522,984,010.74/20,478.96
  6. Step 6: Final answer
    x = 25,537.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.