Home / 20,869.29-28,799.42-11,437.79

Finding the Fourth Proportional to 20,869.29, 28,799.42 and 11,437.79

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Solution

The fourth proportional to 20,869.29, 28,799.42 and 11,437.79 is: 15,784.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.29 : 28,799.42 = 11,437.79 : x
  2. Step 2: Convert to fraction form
    20,869.29/28,799.42 = 11,437.79/x
  3. Step 3: Cross multiply
    20,869.29x = 28,799.42 × 11,437.79
  4. Step 4: Simplify right side
    20,869.29x = 329,401,516.90
  5. Step 5: Solve for x
    x = 329,401,516.90/20,869.29
  6. Step 6: Final answer
    x = 15,784.03

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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.