Home / 18,687.51-25,788.78-11,133.65

Finding the Fourth Proportional to 18,687.51, 25,788.78 and 11,133.65

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Solution

The fourth proportional to 18,687.51, 25,788.78 and 11,133.65 is: 15,364.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.51 : 25,788.78 = 11,133.65 : x
  2. Step 2: Convert to fraction form
    18,687.51/25,788.78 = 11,133.65/x
  3. Step 3: Cross multiply
    18,687.51x = 25,788.78 × 11,133.65
  4. Step 4: Simplify right side
    18,687.51x = 287,123,314.92
  5. Step 5: Solve for x
    x = 287,123,314.92/18,687.51
  6. Step 6: Final answer
    x = 15,364.45

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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.