Home / 20,716.92-28,587.99-12,218.64

Finding the Fourth Proportional to 20,716.92, 28,587.99 and 12,218.64

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Solution

The fourth proportional to 20,716.92, 28,587.99 and 12,218.64 is: 16,860.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.92 : 28,587.99 = 12,218.64 : x
  2. Step 2: Convert to fraction form
    20,716.92/28,587.99 = 12,218.64/x
  3. Step 3: Cross multiply
    20,716.92x = 28,587.99 × 12,218.64
  4. Step 4: Simplify right side
    20,716.92x = 349,306,358.13
  5. Step 5: Solve for x
    x = 349,306,358.13/20,716.92
  6. Step 6: Final answer
    x = 16,860.92

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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.