Home / 13,749.78-18,974.54-7,700.07

Finding the Fourth Proportional to 13,749.78, 18,974.54 and 7,700.07

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Solution

The fourth proportional to 13,749.78, 18,974.54 and 7,700.07 is: 10,626.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.78 : 18,974.54 = 7,700.07 : x
  2. Step 2: Convert to fraction form
    13,749.78/18,974.54 = 7,700.07/x
  3. Step 3: Cross multiply
    13,749.78x = 18,974.54 × 7,700.07
  4. Step 4: Simplify right side
    13,749.78x = 146,105,286.22
  5. Step 5: Solve for x
    x = 146,105,286.22/13,749.78
  6. Step 6: Final answer
    x = 10,626.01

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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.