Home / 20,869.99-28,799.55-11,795.15

Finding the Fourth Proportional to 20,869.99, 28,799.55 and 11,795.15

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Solution

The fourth proportional to 20,869.99, 28,799.55 and 11,795.15 is: 16,276.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.99 : 28,799.55 = 11,795.15 : x
  2. Step 2: Convert to fraction form
    20,869.99/28,799.55 = 11,795.15/x
  3. Step 3: Cross multiply
    20,869.99x = 28,799.55 × 11,795.15
  4. Step 4: Simplify right side
    20,869.99x = 339,695,084.18
  5. Step 5: Solve for x
    x = 339,695,084.18/20,869.99
  6. Step 6: Final answer
    x = 16,276.73

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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.