Home / 13,678.77-20,518.16-3,290.52

Finding the Fourth Proportional to 13,678.77, 20,518.16 and 3,290.52

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Solution

The fourth proportional to 13,678.77, 20,518.16 and 3,290.52 is: 4,935.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.77 : 20,518.16 = 3,290.52 : x
  2. Step 2: Convert to fraction form
    13,678.77/20,518.16 = 3,290.52/x
  3. Step 3: Cross multiply
    13,678.77x = 20,518.16 × 3,290.52
  4. Step 4: Simplify right side
    13,678.77x = 67,515,399.39
  5. Step 5: Solve for x
    x = 67,515,399.39/13,678.77
  6. Step 6: Final answer
    x = 4,935.78

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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.