Home / 20,190.87-30,254.82-12,779.67

Finding the Fourth Proportional to 20,190.87, 30,254.82 and 12,779.67

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Solution

The fourth proportional to 20,190.87, 30,254.82 and 12,779.67 is: 19,149.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.87 : 30,254.82 = 12,779.67 : x
  2. Step 2: Convert to fraction form
    20,190.87/30,254.82 = 12,779.67/x
  3. Step 3: Cross multiply
    20,190.87x = 30,254.82 × 12,779.67
  4. Step 4: Simplify right side
    20,190.87x = 386,646,681.04
  5. Step 5: Solve for x
    x = 386,646,681.04/20,190.87
  6. Step 6: Final answer
    x = 19,149.58

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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.