Home / 21,900.55-30,222.79-12,469.12

Finding the Fourth Proportional to 21,900.55, 30,222.79 and 12,469.12

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Solution

The fourth proportional to 21,900.55, 30,222.79 and 12,469.12 is: 17,207.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900.55 : 30,222.79 = 12,469.12 : x
  2. Step 2: Convert to fraction form
    21,900.55/30,222.79 = 12,469.12/x
  3. Step 3: Cross multiply
    21,900.55x = 30,222.79 × 12,469.12
  4. Step 4: Simplify right side
    21,900.55x = 376,851,595.24
  5. Step 5: Solve for x
    x = 376,851,595.24/21,900.55
  6. Step 6: Final answer
    x = 17,207.40

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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.