Home / 12,789.06-19,186.20-5,393.51

Finding the Fourth Proportional to 12,789.06, 19,186.20 and 5,393.51

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Solution

The fourth proportional to 12,789.06, 19,186.20 and 5,393.51 is: 8,091.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789.06 : 19,186.20 = 5,393.51 : x
  2. Step 2: Convert to fraction form
    12,789.06/19,186.20 = 5,393.51/x
  3. Step 3: Cross multiply
    12,789.06x = 19,186.20 × 5,393.51
  4. Step 4: Simplify right side
    12,789.06x = 103,480,865.63
  5. Step 5: Solve for x
    x = 103,480,865.63/12,789.06
  6. Step 6: Final answer
    x = 8,091.36

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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.