Home / 12,906.90-19,343.34-9,979.56

Finding the Fourth Proportional to 12,906.90, 19,343.34 and 9,979.56

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Solution

The fourth proportional to 12,906.90, 19,343.34 and 9,979.56 is: 14,956.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,906.90 : 19,343.34 = 9,979.56 : x
  2. Step 2: Convert to fraction form
    12,906.90/19,343.34 = 9,979.56/x
  3. Step 3: Cross multiply
    12,906.90x = 19,343.34 × 9,979.56
  4. Step 4: Simplify right side
    12,906.90x = 193,038,022.13
  5. Step 5: Solve for x
    x = 193,038,022.13/12,906.90
  6. Step 6: Final answer
    x = 14,956.19

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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.