Home / 20,438.82-28,206.28-11,486.12

Finding the Fourth Proportional to 20,438.82, 28,206.28 and 11,486.12

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Solution

The fourth proportional to 20,438.82, 28,206.28 and 11,486.12 is: 15,851.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.82 : 28,206.28 = 11,486.12 : x
  2. Step 2: Convert to fraction form
    20,438.82/28,206.28 = 11,486.12/x
  3. Step 3: Cross multiply
    20,438.82x = 28,206.28 × 11,486.12
  4. Step 4: Simplify right side
    20,438.82x = 323,980,716.83
  5. Step 5: Solve for x
    x = 323,980,716.83/20,438.82
  6. Step 6: Final answer
    x = 15,851.24

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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.