Home / 20,772.92-28,666.40-12,811.96

Finding the Fourth Proportional to 20,772.92, 28,666.40 and 12,811.96

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Solution

The fourth proportional to 20,772.92, 28,666.40 and 12,811.96 is: 17,680.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.92 : 28,666.40 = 12,811.96 : x
  2. Step 2: Convert to fraction form
    20,772.92/28,666.40 = 12,811.96/x
  3. Step 3: Cross multiply
    20,772.92x = 28,666.40 × 12,811.96
  4. Step 4: Simplify right side
    20,772.92x = 367,272,770.14
  5. Step 5: Solve for x
    x = 367,272,770.14/20,772.92
  6. Step 6: Final answer
    x = 17,680.36

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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.