Home / 12,906.20-19,343.10-9,439.40

Finding the Fourth Proportional to 12,906.20, 19,343.10 and 9,439.40

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Solution

The fourth proportional to 12,906.20, 19,343.10 and 9,439.40 is: 14,147.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,906.20 : 19,343.10 = 9,439.40 : x
  2. Step 2: Convert to fraction form
    12,906.20/19,343.10 = 9,439.40/x
  3. Step 3: Cross multiply
    12,906.20x = 19,343.10 × 9,439.40
  4. Step 4: Simplify right side
    12,906.20x = 182,587,258.14
  5. Step 5: Solve for x
    x = 182,587,258.14/12,906.20
  6. Step 6: Final answer
    x = 14,147.25

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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.