Home / 8,212.35-12,300.30-4,312.20

Finding the Fourth Proportional to 8,212.35, 12,300.30 and 4,312.20

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Solution

The fourth proportional to 8,212.35, 12,300.30 and 4,312.20 is: 6,458.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,212.35 : 12,300.30 = 4,312.20 : x
  2. Step 2: Convert to fraction form
    8,212.35/12,300.30 = 4,312.20/x
  3. Step 3: Cross multiply
    8,212.35x = 12,300.30 × 4,312.20
  4. Step 4: Simplify right side
    8,212.35x = 53,041,353.66
  5. Step 5: Solve for x
    x = 53,041,353.66/8,212.35
  6. Step 6: Final answer
    x = 6,458.73

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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.