Home / 19,855.05-27,401.37-13,128.99

Finding the Fourth Proportional to 19,855.05, 27,401.37 and 13,128.99

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Solution

The fourth proportional to 19,855.05, 27,401.37 and 13,128.99 is: 18,118.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,855.05 : 27,401.37 = 13,128.99 : x
  2. Step 2: Convert to fraction form
    19,855.05/27,401.37 = 13,128.99/x
  3. Step 3: Cross multiply
    19,855.05x = 27,401.37 × 13,128.99
  4. Step 4: Simplify right side
    19,855.05x = 359,752,312.72
  5. Step 5: Solve for x
    x = 359,752,312.72/19,855.05
  6. Step 6: Final answer
    x = 18,118.93

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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.