Home / 13,749.32-18,974.58-7,781.24

Finding the Fourth Proportional to 13,749.32, 18,974.58 and 7,781.24

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Solution

The fourth proportional to 13,749.32, 18,974.58 and 7,781.24 is: 10,738.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.32 : 18,974.58 = 7,781.24 : x
  2. Step 2: Convert to fraction form
    13,749.32/18,974.58 = 7,781.24/x
  3. Step 3: Cross multiply
    13,749.32x = 18,974.58 × 7,781.24
  4. Step 4: Simplify right side
    13,749.32x = 147,645,760.88
  5. Step 5: Solve for x
    x = 147,645,760.88/13,749.32
  6. Step 6: Final answer
    x = 10,738.40

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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.