Home / 20,883.15-31,340.29-8,403.28

Finding the Fourth Proportional to 20,883.15, 31,340.29 and 8,403.28

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Solution

The fourth proportional to 20,883.15, 31,340.29 and 8,403.28 is: 12,611.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.15 : 31,340.29 = 8,403.28 : x
  2. Step 2: Convert to fraction form
    20,883.15/31,340.29 = 8,403.28/x
  3. Step 3: Cross multiply
    20,883.15x = 31,340.29 × 8,403.28
  4. Step 4: Simplify right side
    20,883.15x = 263,361,232.15
  5. Step 5: Solve for x
    x = 263,361,232.15/20,883.15
  6. Step 6: Final answer
    x = 12,611.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.