Home / 15,623.78-21,570.87-13,942.29

Finding the Fourth Proportional to 15,623.78, 21,570.87 and 13,942.29

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Solution

The fourth proportional to 15,623.78, 21,570.87 and 13,942.29 is: 19,249.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,623.78 : 21,570.87 = 13,942.29 : x
  2. Step 2: Convert to fraction form
    15,623.78/21,570.87 = 13,942.29/x
  3. Step 3: Cross multiply
    15,623.78x = 21,570.87 × 13,942.29
  4. Step 4: Simplify right side
    15,623.78x = 300,747,458.27
  5. Step 5: Solve for x
    x = 300,747,458.27/15,623.78
  6. Step 6: Final answer
    x = 19,249.35

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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.