Home / 20,404.08-28,162.02-15,571.36

Finding the Fourth Proportional to 20,404.08, 28,162.02 and 15,571.36

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Solution

The fourth proportional to 20,404.08, 28,162.02 and 15,571.36 is: 21,491.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404.08 : 28,162.02 = 15,571.36 : x
  2. Step 2: Convert to fraction form
    20,404.08/28,162.02 = 15,571.36/x
  3. Step 3: Cross multiply
    20,404.08x = 28,162.02 × 15,571.36
  4. Step 4: Simplify right side
    20,404.08x = 438,520,951.75
  5. Step 5: Solve for x
    x = 438,520,951.75/20,404.08
  6. Step 6: Final answer
    x = 21,491.83

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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.