Home / 19,378.92-26,749.67-11,420.64

Finding the Fourth Proportional to 19,378.92, 26,749.67 and 11,420.64

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Solution

The fourth proportional to 19,378.92, 26,749.67 and 11,420.64 is: 15,764.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,378.92 : 26,749.67 = 11,420.64 : x
  2. Step 2: Convert to fraction form
    19,378.92/26,749.67 = 11,420.64/x
  3. Step 3: Cross multiply
    19,378.92x = 26,749.67 × 11,420.64
  4. Step 4: Simplify right side
    19,378.92x = 305,498,351.19
  5. Step 5: Solve for x
    x = 305,498,351.19/19,378.92
  6. Step 6: Final answer
    x = 15,764.47

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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.