Home / 21,790.34-30,069.40-12,229.34

Finding the Fourth Proportional to 21,790.34, 30,069.40 and 12,229.34

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Solution

The fourth proportional to 21,790.34, 30,069.40 and 12,229.34 is: 16,875.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.34 : 30,069.40 = 12,229.34 : x
  2. Step 2: Convert to fraction form
    21,790.34/30,069.40 = 12,229.34/x
  3. Step 3: Cross multiply
    21,790.34x = 30,069.40 × 12,229.34
  4. Step 4: Simplify right side
    21,790.34x = 367,728,735.28
  5. Step 5: Solve for x
    x = 367,728,735.28/21,790.34
  6. Step 6: Final answer
    x = 16,875.77

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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.