Home / 15,858.78-21,835.32-13,463.79

Finding the Fourth Proportional to 15,858.78, 21,835.32 and 13,463.79

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Solution

The fourth proportional to 15,858.78, 21,835.32 and 13,463.79 is: 18,537.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,858.78 : 21,835.32 = 13,463.79 : x
  2. Step 2: Convert to fraction form
    15,858.78/21,835.32 = 13,463.79/x
  3. Step 3: Cross multiply
    15,858.78x = 21,835.32 × 13,463.79
  4. Step 4: Simplify right side
    15,858.78x = 293,986,163.06
  5. Step 5: Solve for x
    x = 293,986,163.06/15,858.78
  6. Step 6: Final answer
    x = 18,537.75

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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.