Home / 20,438.21-28,203.81-11,941.12

Finding the Fourth Proportional to 20,438.21, 28,203.81 and 11,941.12

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Solution

The fourth proportional to 20,438.21, 28,203.81 and 11,941.12 is: 16,478.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.21 : 28,203.81 = 11,941.12 : x
  2. Step 2: Convert to fraction form
    20,438.21/28,203.81 = 11,941.12/x
  3. Step 3: Cross multiply
    20,438.21x = 28,203.81 × 11,941.12
  4. Step 4: Simplify right side
    20,438.21x = 336,785,079.67
  5. Step 5: Solve for x
    x = 336,785,079.67/20,438.21
  6. Step 6: Final answer
    x = 16,478.21

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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.