Home / 20,812.92-28,722.42-11,381.64

Finding the Fourth Proportional to 20,812.92, 28,722.42 and 11,381.64

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Solution

The fourth proportional to 20,812.92, 28,722.42 and 11,381.64 is: 15,706.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.92 : 28,722.42 = 11,381.64 : x
  2. Step 2: Convert to fraction form
    20,812.92/28,722.42 = 11,381.64/x
  3. Step 3: Cross multiply
    20,812.92x = 28,722.42 × 11,381.64
  4. Step 4: Simplify right side
    20,812.92x = 326,908,244.37
  5. Step 5: Solve for x
    x = 326,908,244.37/20,812.92
  6. Step 6: Final answer
    x = 15,706.99

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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.