Home / 12,979.72-19,469.58-4,215.52

Finding the Fourth Proportional to 12,979.72, 19,469.58 and 4,215.52

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Solution

The fourth proportional to 12,979.72, 19,469.58 and 4,215.52 is: 6,323.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.72 : 19,469.58 = 4,215.52 : x
  2. Step 2: Convert to fraction form
    12,979.72/19,469.58 = 4,215.52/x
  3. Step 3: Cross multiply
    12,979.72x = 19,469.58 × 4,215.52
  4. Step 4: Simplify right side
    12,979.72x = 82,074,403.88
  5. Step 5: Solve for x
    x = 82,074,403.88/12,979.72
  6. Step 6: Final answer
    x = 6,323.28

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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.