Home / 20,438.63-28,205.42-11,364.11

Finding the Fourth Proportional to 20,438.63, 28,205.42 and 11,364.11

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Solution

The fourth proportional to 20,438.63, 28,205.42 and 11,364.11 is: 15,682.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.63 : 28,205.42 = 11,364.11 : x
  2. Step 2: Convert to fraction form
    20,438.63/28,205.42 = 11,364.11/x
  3. Step 3: Cross multiply
    20,438.63x = 28,205.42 × 11,364.11
  4. Step 4: Simplify right side
    20,438.63x = 320,529,438.66
  5. Step 5: Solve for x
    x = 320,529,438.66/20,438.63
  6. Step 6: Final answer
    x = 15,682.53

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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.