Home / 21,868.08-30,180.48-12,438.12

Finding the Fourth Proportional to 21,868.08, 30,180.48 and 12,438.12

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Solution

The fourth proportional to 21,868.08, 30,180.48 and 12,438.12 is: 17,166.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.08 : 30,180.48 = 12,438.12 : x
  2. Step 2: Convert to fraction form
    21,868.08/30,180.48 = 12,438.12/x
  3. Step 3: Cross multiply
    21,868.08x = 30,180.48 × 12,438.12
  4. Step 4: Simplify right side
    21,868.08x = 375,388,431.90
  5. Step 5: Solve for x
    x = 375,388,431.90/21,868.08
  6. Step 6: Final answer
    x = 17,166.04

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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.