Home / 21,790.68-30,072.60-12,359.85

Finding the Fourth Proportional to 21,790.68, 30,072.60 and 12,359.85

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Solution

The fourth proportional to 21,790.68, 30,072.60 and 12,359.85 is: 17,057.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.68 : 30,072.60 = 12,359.85 : x
  2. Step 2: Convert to fraction form
    21,790.68/30,072.60 = 12,359.85/x
  3. Step 3: Cross multiply
    21,790.68x = 30,072.60 × 12,359.85
  4. Step 4: Simplify right side
    21,790.68x = 371,692,825.11
  5. Step 5: Solve for x
    x = 371,692,825.11/21,790.68
  6. Step 6: Final answer
    x = 17,057.42

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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.