Home / 20,717.60-28,607.16-16,889.85

Finding the Fourth Proportional to 20,717.60, 28,607.16 and 16,889.85

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Solution

The fourth proportional to 20,717.60, 28,607.16 and 16,889.85 is: 23,321.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.60 : 28,607.16 = 16,889.85 : x
  2. Step 2: Convert to fraction form
    20,717.60/28,607.16 = 16,889.85/x
  3. Step 3: Cross multiply
    20,717.60x = 28,607.16 × 16,889.85
  4. Step 4: Simplify right side
    20,717.60x = 483,170,641.33
  5. Step 5: Solve for x
    x = 483,170,641.33/20,717.60
  6. Step 6: Final answer
    x = 23,321.75

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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.