Home / 8,420.12-11,620.88-4,882.60

Finding the Fourth Proportional to 8,420.12, 11,620.88 and 4,882.60

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Solution

The fourth proportional to 8,420.12, 11,620.88 and 4,882.60 is: 6,738.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.12 : 11,620.88 = 4,882.60 : x
  2. Step 2: Convert to fraction form
    8,420.12/11,620.88 = 4,882.60/x
  3. Step 3: Cross multiply
    8,420.12x = 11,620.88 × 4,882.60
  4. Step 4: Simplify right side
    8,420.12x = 56,740,108.69
  5. Step 5: Solve for x
    x = 56,740,108.69/8,420.12
  6. Step 6: Final answer
    x = 6,738.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.