Home / 20,792.91-28,690.90-11,840.59

Finding the Fourth Proportional to 20,792.91, 28,690.90 and 11,840.59

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Solution

The fourth proportional to 20,792.91, 28,690.90 and 11,840.59 is: 16,338.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.91 : 28,690.90 = 11,840.59 : x
  2. Step 2: Convert to fraction form
    20,792.91/28,690.90 = 11,840.59/x
  3. Step 3: Cross multiply
    20,792.91x = 28,690.90 × 11,840.59
  4. Step 4: Simplify right side
    20,792.91x = 339,717,082.30
  5. Step 5: Solve for x
    x = 339,717,082.30/20,792.91
  6. Step 6: Final answer
    x = 16,338.12

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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.