Home / 20,219.72-30,301.82-12,810.99

Finding the Fourth Proportional to 20,219.72, 30,301.82 and 12,810.99

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Solution

The fourth proportional to 20,219.72, 30,301.82 and 12,810.99 is: 19,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.72 : 30,301.82 = 12,810.99 : x
  2. Step 2: Convert to fraction form
    20,219.72/30,301.82 = 12,810.99/x
  3. Step 3: Cross multiply
    20,219.72x = 30,301.82 × 12,810.99
  4. Step 4: Simplify right side
    20,219.72x = 388,196,248.95
  5. Step 5: Solve for x
    x = 388,196,248.95/20,219.72
  6. Step 6: Final answer
    x = 19,198.90

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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.