Home / 20,899.72-28,879.74-15,224.56

Finding the Fourth Proportional to 20,899.72, 28,879.74 and 15,224.56

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Solution

The fourth proportional to 20,899.72, 28,879.74 and 15,224.56 is: 21,037.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.72 : 28,879.74 = 15,224.56 : x
  2. Step 2: Convert to fraction form
    20,899.72/28,879.74 = 15,224.56/x
  3. Step 3: Cross multiply
    20,899.72x = 28,879.74 × 15,224.56
  4. Step 4: Simplify right side
    20,899.72x = 439,681,262.22
  5. Step 5: Solve for x
    x = 439,681,262.22/20,899.72
  6. Step 6: Final answer
    x = 21,037.66

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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.