Home / 20,039.76-27,622.92-15,784.08

Finding the Fourth Proportional to 20,039.76, 27,622.92 and 15,784.08

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Solution

The fourth proportional to 20,039.76, 27,622.92 and 15,784.08 is: 21,756.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,039.76 : 27,622.92 = 15,784.08 : x
  2. Step 2: Convert to fraction form
    20,039.76/27,622.92 = 15,784.08/x
  3. Step 3: Cross multiply
    20,039.76x = 27,622.92 × 15,784.08
  4. Step 4: Simplify right side
    20,039.76x = 436,002,379.11
  5. Step 5: Solve for x
    x = 436,002,379.11/20,039.76
  6. Step 6: Final answer
    x = 21,756.87

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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.