Home / 13,513.12-20,269.78-4,279.12

Finding the Fourth Proportional to 13,513.12, 20,269.78 and 4,279.12

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Solution

The fourth proportional to 13,513.12, 20,269.78 and 4,279.12 is: 6,418.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,513.12 : 20,269.78 = 4,279.12 : x
  2. Step 2: Convert to fraction form
    13,513.12/20,269.78 = 4,279.12/x
  3. Step 3: Cross multiply
    13,513.12x = 20,269.78 × 4,279.12
  4. Step 4: Simplify right side
    13,513.12x = 86,736,820.99
  5. Step 5: Solve for x
    x = 86,736,820.99/13,513.12
  6. Step 6: Final answer
    x = 6,418.71

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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.