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Finding the Fourth Proportional to 20,873.99, 28,805.07 and 11,799.15

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Solution

The fourth proportional to 20,873.99, 28,805.07 and 11,799.15 is: 16,282.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.99 : 28,805.07 = 11,799.15 : x
  2. Step 2: Convert to fraction form
    20,873.99/28,805.07 = 11,799.15/x
  3. Step 3: Cross multiply
    20,873.99x = 28,805.07 × 11,799.15
  4. Step 4: Simplify right side
    20,873.99x = 339,875,341.69
  5. Step 5: Solve for x
    x = 339,875,341.69/20,873.99
  6. Step 6: Final answer
    x = 16,282.24

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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.