Home / 13,890.84-19,172.70-7,926

Finding the Fourth Proportional to 13,890.84, 19,172.70 and 7,926

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Solution

The fourth proportional to 13,890.84, 19,172.70 and 7,926 is: 10,939.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.84 : 19,172.70 = 7,926 : x
  2. Step 2: Convert to fraction form
    13,890.84/19,172.70 = 7,926/x
  3. Step 3: Cross multiply
    13,890.84x = 19,172.70 × 7,926
  4. Step 4: Simplify right side
    13,890.84x = 151,962,820.20
  5. Step 5: Solve for x
    x = 151,962,820.20/13,890.84
  6. Step 6: Final answer
    x = 10,939.79

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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.