Home / 18,687.39-25,789.64-12,395.31

Finding the Fourth Proportional to 18,687.39, 25,789.64 and 12,395.31

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Solution

The fourth proportional to 18,687.39, 25,789.64 and 12,395.31 is: 17,106.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.39 : 25,789.64 = 12,395.31 : x
  2. Step 2: Convert to fraction form
    18,687.39/25,789.64 = 12,395.31/x
  3. Step 3: Cross multiply
    18,687.39x = 25,789.64 × 12,395.31
  4. Step 4: Simplify right side
    18,687.39x = 319,670,520.61
  5. Step 5: Solve for x
    x = 319,670,520.61/18,687.39
  6. Step 6: Final answer
    x = 17,106.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.