Home / 13,778.92-20,668.38-4,291.39

Finding the Fourth Proportional to 13,778.92, 20,668.38 and 4,291.39

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Solution

The fourth proportional to 13,778.92, 20,668.38 and 4,291.39 is: 6,437.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.92 : 20,668.38 = 4,291.39 : x
  2. Step 2: Convert to fraction form
    13,778.92/20,668.38 = 4,291.39/x
  3. Step 3: Cross multiply
    13,778.92x = 20,668.38 × 4,291.39
  4. Step 4: Simplify right side
    13,778.92x = 88,696,079.25
  5. Step 5: Solve for x
    x = 88,696,079.25/13,778.92
  6. Step 6: Final answer
    x = 6,437.09

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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.