Home / 20,847.20-28,774.19-12,884.63

Finding the Fourth Proportional to 20,847.20, 28,774.19 and 12,884.63

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Solution

The fourth proportional to 20,847.20, 28,774.19 and 12,884.63 is: 17,783.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.20 : 28,774.19 = 12,884.63 : x
  2. Step 2: Convert to fraction form
    20,847.20/28,774.19 = 12,884.63/x
  3. Step 3: Cross multiply
    20,847.20x = 28,774.19 × 12,884.63
  4. Step 4: Simplify right side
    20,847.20x = 370,744,680.04
  5. Step 5: Solve for x
    x = 370,744,680.04/20,847.20
  6. Step 6: Final answer
    x = 17,783.91

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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.