Home / 13,731.28-18,944.70-7,762.36

Finding the Fourth Proportional to 13,731.28, 18,944.70 and 7,762.36

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Solution

The fourth proportional to 13,731.28, 18,944.70 and 7,762.36 is: 10,709.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.28 : 18,944.70 = 7,762.36 : x
  2. Step 2: Convert to fraction form
    13,731.28/18,944.70 = 7,762.36/x
  3. Step 3: Cross multiply
    13,731.28x = 18,944.70 × 7,762.36
  4. Step 4: Simplify right side
    13,731.28x = 147,055,581.49
  5. Step 5: Solve for x
    x = 147,055,581.49/13,731.28
  6. Step 6: Final answer
    x = 10,709.53

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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.