Home / 8,220.20-12,328.70-6,842.39

Finding the Fourth Proportional to 8,220.20, 12,328.70 and 6,842.39

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Solution

The fourth proportional to 8,220.20, 12,328.70 and 6,842.39 is: 10,262.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220.20 : 12,328.70 = 6,842.39 : x
  2. Step 2: Convert to fraction form
    8,220.20/12,328.70 = 6,842.39/x
  3. Step 3: Cross multiply
    8,220.20x = 12,328.70 × 6,842.39
  4. Step 4: Simplify right side
    8,220.20x = 84,357,770.20
  5. Step 5: Solve for x
    x = 84,357,770.20/8,220.20
  6. Step 6: Final answer
    x = 10,262.25

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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.