Home / 20,869.94-28,800.62-11,438.57

Finding the Fourth Proportional to 20,869.94, 28,800.62 and 11,438.57

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Solution

The fourth proportional to 20,869.94, 28,800.62 and 11,438.57 is: 15,785.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.94 : 28,800.62 = 11,438.57 : x
  2. Step 2: Convert to fraction form
    20,869.94/28,800.62 = 11,438.57/x
  3. Step 3: Cross multiply
    20,869.94x = 28,800.62 × 11,438.57
  4. Step 4: Simplify right side
    20,869.94x = 329,437,706.72
  5. Step 5: Solve for x
    x = 329,437,706.72/20,869.94
  6. Step 6: Final answer
    x = 15,785.28

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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.