Home / 20,808.38-28,715.56-13,369.34

Finding the Fourth Proportional to 20,808.38, 28,715.56 and 13,369.34

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Solution

The fourth proportional to 20,808.38, 28,715.56 and 13,369.34 is: 18,449.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.38 : 28,715.56 = 13,369.34 : x
  2. Step 2: Convert to fraction form
    20,808.38/28,715.56 = 13,369.34/x
  3. Step 3: Cross multiply
    20,808.38x = 28,715.56 × 13,369.34
  4. Step 4: Simplify right side
    20,808.38x = 383,908,084.93
  5. Step 5: Solve for x
    x = 383,908,084.93/20,808.38
  6. Step 6: Final answer
    x = 18,449.69

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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.