Home / 20,667.41-28,520.43-11,715.74

Finding the Fourth Proportional to 20,667.41, 28,520.43 and 11,715.74

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Solution

The fourth proportional to 20,667.41, 28,520.43 and 11,715.74 is: 16,167.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.41 : 28,520.43 = 11,715.74 : x
  2. Step 2: Convert to fraction form
    20,667.41/28,520.43 = 11,715.74/x
  3. Step 3: Cross multiply
    20,667.41x = 28,520.43 × 11,715.74
  4. Step 4: Simplify right side
    20,667.41x = 334,137,942.57
  5. Step 5: Solve for x
    x = 334,137,942.57/20,667.41
  6. Step 6: Final answer
    x = 16,167.38

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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.