Home / 12,445.57-18,668.36-3,679.80

Finding the Fourth Proportional to 12,445.57, 18,668.36 and 3,679.80

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Solution

The fourth proportional to 12,445.57, 18,668.36 and 3,679.80 is: 5,519.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,445.57 : 18,668.36 = 3,679.80 : x
  2. Step 2: Convert to fraction form
    12,445.57/18,668.36 = 3,679.80/x
  3. Step 3: Cross multiply
    12,445.57x = 18,668.36 × 3,679.80
  4. Step 4: Simplify right side
    12,445.57x = 68,695,831.13
  5. Step 5: Solve for x
    x = 68,695,831.13/12,445.57
  6. Step 6: Final answer
    x = 5,519.70

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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.