Home / 12,891.13-19,336.69-3,657.13

Finding the Fourth Proportional to 12,891.13, 19,336.69 and 3,657.13

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Solution

The fourth proportional to 12,891.13, 19,336.69 and 3,657.13 is: 5,485.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.13 : 19,336.69 = 3,657.13 : x
  2. Step 2: Convert to fraction form
    12,891.13/19,336.69 = 3,657.13/x
  3. Step 3: Cross multiply
    12,891.13x = 19,336.69 × 3,657.13
  4. Step 4: Simplify right side
    12,891.13x = 70,716,789.10
  5. Step 5: Solve for x
    x = 70,716,789.10/12,891.13
  6. Step 6: Final answer
    x = 5,485.69

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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.