Home / 13,935.78-19,230.78-7,647.75

Finding the Fourth Proportional to 13,935.78, 19,230.78 and 7,647.75

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Solution

The fourth proportional to 13,935.78, 19,230.78 and 7,647.75 is: 10,553.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,935.78 : 19,230.78 = 7,647.75 : x
  2. Step 2: Convert to fraction form
    13,935.78/19,230.78 = 7,647.75/x
  3. Step 3: Cross multiply
    13,935.78x = 19,230.78 × 7,647.75
  4. Step 4: Simplify right side
    13,935.78x = 147,072,197.75
  5. Step 5: Solve for x
    x = 147,072,197.75/13,935.78
  6. Step 6: Final answer
    x = 10,553.57

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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.