Home / 13,754.20-18,981.25-7,785.74

Finding the Fourth Proportional to 13,754.20, 18,981.25 and 7,785.74

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Solution

The fourth proportional to 13,754.20, 18,981.25 and 7,785.74 is: 10,744.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,754.20 : 18,981.25 = 7,785.74 : x
  2. Step 2: Convert to fraction form
    13,754.20/18,981.25 = 7,785.74/x
  3. Step 3: Cross multiply
    13,754.20x = 18,981.25 × 7,785.74
  4. Step 4: Simplify right side
    13,754.20x = 147,783,105.36
  5. Step 5: Solve for x
    x = 147,783,105.36/13,754.20
  6. Step 6: Final answer
    x = 10,744.58

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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.