Home / 20,903.82-28,847.28-12,520.32

Finding the Fourth Proportional to 20,903.82, 28,847.28 and 12,520.32

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Solution

The fourth proportional to 20,903.82, 28,847.28 and 12,520.32 is: 17,278.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.82 : 28,847.28 = 12,520.32 : x
  2. Step 2: Convert to fraction form
    20,903.82/28,847.28 = 12,520.32/x
  3. Step 3: Cross multiply
    20,903.82x = 28,847.28 × 12,520.32
  4. Step 4: Simplify right side
    20,903.82x = 361,177,114.13
  5. Step 5: Solve for x
    x = 361,177,114.13/20,903.82
  6. Step 6: Final answer
    x = 17,278.04

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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.