Home / 20,212.40-30,307.80-8,512.40

Finding the Fourth Proportional to 20,212.40, 30,307.80 and 8,512.40

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Solution

The fourth proportional to 20,212.40, 30,307.80 and 8,512.40 is: 12,764.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.40 : 30,307.80 = 8,512.40 : x
  2. Step 2: Convert to fraction form
    20,212.40/30,307.80 = 8,512.40/x
  3. Step 3: Cross multiply
    20,212.40x = 30,307.80 × 8,512.40
  4. Step 4: Simplify right side
    20,212.40x = 257,992,116.72
  5. Step 5: Solve for x
    x = 257,992,116.72/20,212.40
  6. Step 6: Final answer
    x = 12,764.05

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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.