Home / 31,296.25-43,188.87-18,721

Finding the Fourth Proportional to 31,296.25, 43,188.87 and 18,721

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Solution

The fourth proportional to 31,296.25, 43,188.87 and 18,721 is: 25,835.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,296.25 : 43,188.87 = 18,721 : x
  2. Step 2: Convert to fraction form
    31,296.25/43,188.87 = 18,721/x
  3. Step 3: Cross multiply
    31,296.25x = 43,188.87 × 18,721
  4. Step 4: Simplify right side
    31,296.25x = 808,538,835.27
  5. Step 5: Solve for x
    x = 808,538,835.27/31,296.25
  6. Step 6: Final answer
    x = 25,835.01

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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.