Home / 13,618.29-18,786.81-11,649.99

Finding the Fourth Proportional to 13,618.29, 18,786.81 and 11,649.99

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Solution

The fourth proportional to 13,618.29, 18,786.81 and 11,649.99 is: 16,071.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,618.29 : 18,786.81 = 11,649.99 : x
  2. Step 2: Convert to fraction form
    13,618.29/18,786.81 = 11,649.99/x
  3. Step 3: Cross multiply
    13,618.29x = 18,786.81 × 11,649.99
  4. Step 4: Simplify right side
    13,618.29x = 218,866,148.63
  5. Step 5: Solve for x
    x = 218,866,148.63/13,618.29
  6. Step 6: Final answer
    x = 16,071.49

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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.