Home / 21,138.03-29,170.20-11,577.81

Finding the Fourth Proportional to 21,138.03, 29,170.20 and 11,577.81

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Solution

The fourth proportional to 21,138.03, 29,170.20 and 11,577.81 is: 15,977.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.03 : 29,170.20 = 11,577.81 : x
  2. Step 2: Convert to fraction form
    21,138.03/29,170.20 = 11,577.81/x
  3. Step 3: Cross multiply
    21,138.03x = 29,170.20 × 11,577.81
  4. Step 4: Simplify right side
    21,138.03x = 337,727,033.26
  5. Step 5: Solve for x
    x = 337,727,033.26/21,138.03
  6. Step 6: Final answer
    x = 15,977.22

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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.