Home / 21,140.82-29,172.26-12,641.24

Finding the Fourth Proportional to 21,140.82, 29,172.26 and 12,641.24

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Solution

The fourth proportional to 21,140.82, 29,172.26 and 12,641.24 is: 17,443.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.82 : 29,172.26 = 12,641.24 : x
  2. Step 2: Convert to fraction form
    21,140.82/29,172.26 = 12,641.24/x
  3. Step 3: Cross multiply
    21,140.82x = 29,172.26 × 12,641.24
  4. Step 4: Simplify right side
    21,140.82x = 368,773,540.00
  5. Step 5: Solve for x
    x = 368,773,540.00/21,140.82
  6. Step 6: Final answer
    x = 17,443.67

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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.