Home / 20,847.89-28,763.85-12,892.68

Finding the Fourth Proportional to 20,847.89, 28,763.85 and 12,892.68

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Solution

The fourth proportional to 20,847.89, 28,763.85 and 12,892.68 is: 17,788.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.89 : 28,763.85 = 12,892.68 : x
  2. Step 2: Convert to fraction form
    20,847.89/28,763.85 = 12,892.68/x
  3. Step 3: Cross multiply
    20,847.89x = 28,763.85 × 12,892.68
  4. Step 4: Simplify right side
    20,847.89x = 370,843,113.62
  5. Step 5: Solve for x
    x = 370,843,113.62/20,847.89
  6. Step 6: Final answer
    x = 17,788.04

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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.