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Finding the Fourth Proportional to 13,119.77, 18,104.63 and 7,453.78

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Solution

The fourth proportional to 13,119.77, 18,104.63 and 7,453.78 is: 10,285.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.77 : 18,104.63 = 7,453.78 : x
  2. Step 2: Convert to fraction form
    13,119.77/18,104.63 = 7,453.78/x
  3. Step 3: Cross multiply
    13,119.77x = 18,104.63 × 7,453.78
  4. Step 4: Simplify right side
    13,119.77x = 134,947,846.47
  5. Step 5: Solve for x
    x = 134,947,846.47/13,119.77
  6. Step 6: Final answer
    x = 10,285.84

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1.5x scale

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.