Home / 12,201.12-18,303.84-4,420.80

Finding the Fourth Proportional to 12,201.12, 18,303.84 and 4,420.80

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Solution

The fourth proportional to 12,201.12, 18,303.84 and 4,420.80 is: 6,631.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,201.12 : 18,303.84 = 4,420.80 : x
  2. Step 2: Convert to fraction form
    12,201.12/18,303.84 = 4,420.80/x
  3. Step 3: Cross multiply
    12,201.12x = 18,303.84 × 4,420.80
  4. Step 4: Simplify right side
    12,201.12x = 80,917,615.87
  5. Step 5: Solve for x
    x = 80,917,615.87/12,201.12
  6. Step 6: Final answer
    x = 6,631.98

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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.