Home / 13,911.05-20,851.99-5,140.37

Finding the Fourth Proportional to 13,911.05, 20,851.99 and 5,140.37

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Solution

The fourth proportional to 13,911.05, 20,851.99 and 5,140.37 is: 7,705.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,911.05 : 20,851.99 = 5,140.37 : x
  2. Step 2: Convert to fraction form
    13,911.05/20,851.99 = 5,140.37/x
  3. Step 3: Cross multiply
    13,911.05x = 20,851.99 × 5,140.37
  4. Step 4: Simplify right side
    13,911.05x = 107,186,943.84
  5. Step 5: Solve for x
    x = 107,186,943.84/13,911.05
  6. Step 6: Final answer
    x = 7,705.17

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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.