Home / 12,218.80-18,328.20-3,455.20

Finding the Fourth Proportional to 12,218.80, 18,328.20 and 3,455.20

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Solution

The fourth proportional to 12,218.80, 18,328.20 and 3,455.20 is: 5,182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.80 : 18,328.20 = 3,455.20 : x
  2. Step 2: Convert to fraction form
    12,218.80/18,328.20 = 3,455.20/x
  3. Step 3: Cross multiply
    12,218.80x = 18,328.20 × 3,455.20
  4. Step 4: Simplify right side
    12,218.80x = 63,327,596.64
  5. Step 5: Solve for x
    x = 63,327,596.64/12,218.80
  6. Step 6: Final answer
    x = 5,182.80

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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.