Home / 20,716.85-28,606.12-16,889.09

Finding the Fourth Proportional to 20,716.85, 28,606.12 and 16,889.09

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Solution

The fourth proportional to 20,716.85, 28,606.12 and 16,889.09 is: 23,320.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.85 : 28,606.12 = 16,889.09 : x
  2. Step 2: Convert to fraction form
    20,716.85/28,606.12 = 16,889.09/x
  3. Step 3: Cross multiply
    20,716.85x = 28,606.12 × 16,889.09
  4. Step 4: Simplify right side
    20,716.85x = 483,131,364.52
  5. Step 5: Solve for x
    x = 483,131,364.52/20,716.85
  6. Step 6: Final answer
    x = 23,320.69

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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.