Home / 20,438.15-28,203.73-11,941.05

Finding the Fourth Proportional to 20,438.15, 28,203.73 and 11,941.05

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Solution

The fourth proportional to 20,438.15, 28,203.73 and 11,941.05 is: 16,478.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.15 : 28,203.73 = 11,941.05 : x
  2. Step 2: Convert to fraction form
    20,438.15/28,203.73 = 11,941.05/x
  3. Step 3: Cross multiply
    20,438.15x = 28,203.73 × 11,941.05
  4. Step 4: Simplify right side
    20,438.15x = 336,782,120.26
  5. Step 5: Solve for x
    x = 336,782,120.26/20,438.15
  6. Step 6: Final answer
    x = 16,478.12

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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.