Home / 13,619.84-18,780-11,626.88

Finding the Fourth Proportional to 13,619.84, 18,780 and 11,626.88

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Solution

The fourth proportional to 13,619.84, 18,780 and 11,626.88 is: 16,031.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.84 : 18,780 = 11,626.88 : x
  2. Step 2: Convert to fraction form
    13,619.84/18,780 = 11,626.88/x
  3. Step 3: Cross multiply
    13,619.84x = 18,780 × 11,626.88
  4. Step 4: Simplify right side
    13,619.84x = 218,352,806.40
  5. Step 5: Solve for x
    x = 218,352,806.40/13,619.84
  6. Step 6: Final answer
    x = 16,031.97

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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.