Home / 20,321.87-28,045.51-11,370.92

Finding the Fourth Proportional to 20,321.87, 28,045.51 and 11,370.92

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Solution

The fourth proportional to 20,321.87, 28,045.51 and 11,370.92 is: 15,692.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.87 : 28,045.51 = 11,370.92 : x
  2. Step 2: Convert to fraction form
    20,321.87/28,045.51 = 11,370.92/x
  3. Step 3: Cross multiply
    20,321.87x = 28,045.51 × 11,370.92
  4. Step 4: Simplify right side
    20,321.87x = 318,903,081.91
  5. Step 5: Solve for x
    x = 318,903,081.91/20,321.87
  6. Step 6: Final answer
    x = 15,692.61

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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.