Home / 12,905.01-19,355.69-4,138.79

Finding the Fourth Proportional to 12,905.01, 19,355.69 and 4,138.79

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Solution

The fourth proportional to 12,905.01, 19,355.69 and 4,138.79 is: 6,207.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.01 : 19,355.69 = 4,138.79 : x
  2. Step 2: Convert to fraction form
    12,905.01/19,355.69 = 4,138.79/x
  3. Step 3: Cross multiply
    12,905.01x = 19,355.69 × 4,138.79
  4. Step 4: Simplify right side
    12,905.01x = 80,109,029.09
  5. Step 5: Solve for x
    x = 80,109,029.09/12,905.01
  6. Step 6: Final answer
    x = 6,207.59

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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.