Home / 13,800.68-19,041.70-7,831

Finding the Fourth Proportional to 13,800.68, 19,041.70 and 7,831

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Solution

The fourth proportional to 13,800.68, 19,041.70 and 7,831 is: 10,804.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,800.68 : 19,041.70 = 7,831 : x
  2. Step 2: Convert to fraction form
    13,800.68/19,041.70 = 7,831/x
  3. Step 3: Cross multiply
    13,800.68x = 19,041.70 × 7,831
  4. Step 4: Simplify right side
    13,800.68x = 149,115,552.70
  5. Step 5: Solve for x
    x = 149,115,552.70/13,800.68
  6. Step 6: Final answer
    x = 10,804.94

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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.