Home / 12,309.40-18,464.10-11,288.80

Finding the Fourth Proportional to 12,309.40, 18,464.10 and 11,288.80

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Solution

The fourth proportional to 12,309.40, 18,464.10 and 11,288.80 is: 16,933.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,309.40 : 18,464.10 = 11,288.80 : x
  2. Step 2: Convert to fraction form
    12,309.40/18,464.10 = 11,288.80/x
  3. Step 3: Cross multiply
    12,309.40x = 18,464.10 × 11,288.80
  4. Step 4: Simplify right side
    12,309.40x = 208,437,532.08
  5. Step 5: Solve for x
    x = 208,437,532.08/12,309.40
  6. Step 6: Final answer
    x = 16,933.20

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Similar ratio
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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.