Home / 31,788.65-43,856.23-18,355

Finding the Fourth Proportional to 31,788.65, 43,856.23 and 18,355

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Solution

The fourth proportional to 31,788.65, 43,856.23 and 18,355 is: 25,322.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,788.65 : 43,856.23 = 18,355 : x
  2. Step 2: Convert to fraction form
    31,788.65/43,856.23 = 18,355/x
  3. Step 3: Cross multiply
    31,788.65x = 43,856.23 × 18,355
  4. Step 4: Simplify right side
    31,788.65x = 804,981,101.65
  5. Step 5: Solve for x
    x = 804,981,101.65/31,788.65
  6. Step 6: Final answer
    x = 25,322.91

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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.