Home / 21,619.49-29,830.35-13,126.07

Finding the Fourth Proportional to 21,619.49, 29,830.35 and 13,126.07

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Solution

The fourth proportional to 21,619.49, 29,830.35 and 13,126.07 is: 18,111.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.49 : 29,830.35 = 13,126.07 : x
  2. Step 2: Convert to fraction form
    21,619.49/29,830.35 = 13,126.07/x
  3. Step 3: Cross multiply
    21,619.49x = 29,830.35 × 13,126.07
  4. Step 4: Simplify right side
    21,619.49x = 391,555,336.80
  5. Step 5: Solve for x
    x = 391,555,336.80/21,619.49
  6. Step 6: Final answer
    x = 18,111.22

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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.