Home / 12,612.15-18,919.26-5,215.23

Finding the Fourth Proportional to 12,612.15, 18,919.26 and 5,215.23

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Solution

The fourth proportional to 12,612.15, 18,919.26 and 5,215.23 is: 7,823.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.15 : 18,919.26 = 5,215.23 : x
  2. Step 2: Convert to fraction form
    12,612.15/18,919.26 = 5,215.23/x
  3. Step 3: Cross multiply
    12,612.15x = 18,919.26 × 5,215.23
  4. Step 4: Simplify right side
    12,612.15x = 98,668,292.33
  5. Step 5: Solve for x
    x = 98,668,292.33/12,612.15
  6. Step 6: Final answer
    x = 7,823.27

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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.