Home / 20,622.11-30,863.03-12,729.60

Finding the Fourth Proportional to 20,622.11, 30,863.03 and 12,729.60

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Solution

The fourth proportional to 20,622.11, 30,863.03 and 12,729.60 is: 19,051.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.11 : 30,863.03 = 12,729.60 : x
  2. Step 2: Convert to fraction form
    20,622.11/30,863.03 = 12,729.60/x
  3. Step 3: Cross multiply
    20,622.11x = 30,863.03 × 12,729.60
  4. Step 4: Simplify right side
    20,622.11x = 392,874,058.51
  5. Step 5: Solve for x
    x = 392,874,058.51/20,622.11
  6. Step 6: Final answer
    x = 19,051.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.