Home / 13,240.51-19,860.74-3,379.79

Finding the Fourth Proportional to 13,240.51, 19,860.74 and 3,379.79

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Solution

The fourth proportional to 13,240.51, 19,860.74 and 3,379.79 is: 5,069.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.51 : 19,860.74 = 3,379.79 : x
  2. Step 2: Convert to fraction form
    13,240.51/19,860.74 = 3,379.79/x
  3. Step 3: Cross multiply
    13,240.51x = 19,860.74 × 3,379.79
  4. Step 4: Simplify right side
    13,240.51x = 67,125,031.14
  5. Step 5: Solve for x
    x = 67,125,031.14/13,240.51
  6. Step 6: Final answer
    x = 5,069.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.