Home / 20,519.80-30,779.70-7,372.60

Finding the Fourth Proportional to 20,519.80, 30,779.70 and 7,372.60

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Solution

The fourth proportional to 20,519.80, 30,779.70 and 7,372.60 is: 11,058.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.80 : 30,779.70 = 7,372.60 : x
  2. Step 2: Convert to fraction form
    20,519.80/30,779.70 = 7,372.60/x
  3. Step 3: Cross multiply
    20,519.80x = 30,779.70 × 7,372.60
  4. Step 4: Simplify right side
    20,519.80x = 226,926,416.22
  5. Step 5: Solve for x
    x = 226,926,416.22/20,519.80
  6. Step 6: Final answer
    x = 11,058.90

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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.