Home / 12,999.36-19,498.86-3,138.58

Finding the Fourth Proportional to 12,999.36, 19,498.86 and 3,138.58

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Solution

The fourth proportional to 12,999.36, 19,498.86 and 3,138.58 is: 4,707.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.36 : 19,498.86 = 3,138.58 : x
  2. Step 2: Convert to fraction form
    12,999.36/19,498.86 = 3,138.58/x
  3. Step 3: Cross multiply
    12,999.36x = 19,498.86 × 3,138.58
  4. Step 4: Simplify right side
    12,999.36x = 61,198,732.02
  5. Step 5: Solve for x
    x = 61,198,732.02/12,999.36
  6. Step 6: Final answer
    x = 4,707.83

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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.