Home / 13,761.45-18,990.86-7,473.78

Finding the Fourth Proportional to 13,761.45, 18,990.86 and 7,473.78

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Solution

The fourth proportional to 13,761.45, 18,990.86 and 7,473.78 is: 10,313.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,761.45 : 18,990.86 = 7,473.78 : x
  2. Step 2: Convert to fraction form
    13,761.45/18,990.86 = 7,473.78/x
  3. Step 3: Cross multiply
    13,761.45x = 18,990.86 × 7,473.78
  4. Step 4: Simplify right side
    13,761.45x = 141,933,472.28
  5. Step 5: Solve for x
    x = 141,933,472.28/13,761.45
  6. Step 6: Final answer
    x = 10,313.85

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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.