Home / 20,561.80-28,375.68-12,068.92

Finding the Fourth Proportional to 20,561.80, 28,375.68 and 12,068.92

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Solution

The fourth proportional to 20,561.80, 28,375.68 and 12,068.92 is: 16,655.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.80 : 28,375.68 = 12,068.92 : x
  2. Step 2: Convert to fraction form
    20,561.80/28,375.68 = 12,068.92/x
  3. Step 3: Cross multiply
    20,561.80x = 28,375.68 × 12,068.92
  4. Step 4: Simplify right side
    20,561.80x = 342,463,811.87
  5. Step 5: Solve for x
    x = 342,463,811.87/20,561.80
  6. Step 6: Final answer
    x = 16,655.34

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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.