Home / 20,003.22-30,015.30-12,981.58

Finding the Fourth Proportional to 20,003.22, 30,015.30 and 12,981.58

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Solution

The fourth proportional to 20,003.22, 30,015.30 and 12,981.58 is: 19,479.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,003.22 : 30,015.30 = 12,981.58 : x
  2. Step 2: Convert to fraction form
    20,003.22/30,015.30 = 12,981.58/x
  3. Step 3: Cross multiply
    20,003.22x = 30,015.30 × 12,981.58
  4. Step 4: Simplify right side
    20,003.22x = 389,645,868.10
  5. Step 5: Solve for x
    x = 389,645,868.10/20,003.22
  6. Step 6: Final answer
    x = 19,479.16

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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.