Home / 21,684.06-29,918.64-13,619.04

Finding the Fourth Proportional to 21,684.06, 29,918.64 and 13,619.04

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Solution

The fourth proportional to 21,684.06, 29,918.64 and 13,619.04 is: 18,790.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,684.06 : 29,918.64 = 13,619.04 : x
  2. Step 2: Convert to fraction form
    21,684.06/29,918.64 = 13,619.04/x
  3. Step 3: Cross multiply
    21,684.06x = 29,918.64 × 13,619.04
  4. Step 4: Simplify right side
    21,684.06x = 407,463,154.91
  5. Step 5: Solve for x
    x = 407,463,154.91/21,684.06
  6. Step 6: Final answer
    x = 18,790.91

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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.