Home / 12,929.88-19,399.68-7,739.40

Finding the Fourth Proportional to 12,929.88, 19,399.68 and 7,739.40

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Solution

The fourth proportional to 12,929.88, 19,399.68 and 7,739.40 is: 11,612.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,929.88 : 19,399.68 = 7,739.40 : x
  2. Step 2: Convert to fraction form
    12,929.88/19,399.68 = 7,739.40/x
  3. Step 3: Cross multiply
    12,929.88x = 19,399.68 × 7,739.40
  4. Step 4: Simplify right side
    12,929.88x = 150,141,883.39
  5. Step 5: Solve for x
    x = 150,141,883.39/12,929.88
  6. Step 6: Final answer
    x = 11,612.01

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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.