Home / 12,912.90-19,369.35-9,993.30

Finding the Fourth Proportional to 12,912.90, 19,369.35 and 9,993.30

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Solution

The fourth proportional to 12,912.90, 19,369.35 and 9,993.30 is: 14,989.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.90 : 19,369.35 = 9,993.30 : x
  2. Step 2: Convert to fraction form
    12,912.90/19,369.35 = 9,993.30/x
  3. Step 3: Cross multiply
    12,912.90x = 19,369.35 × 9,993.30
  4. Step 4: Simplify right side
    12,912.90x = 193,563,725.36
  5. Step 5: Solve for x
    x = 193,563,725.36/12,912.90
  6. Step 6: Final answer
    x = 14,989.95

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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.