Home / 21,138.64-29,171.37-11,707.36

Finding the Fourth Proportional to 21,138.64, 29,171.37 and 11,707.36

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Solution

The fourth proportional to 21,138.64, 29,171.37 and 11,707.36 is: 16,156.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.64 : 29,171.37 = 11,707.36 : x
  2. Step 2: Convert to fraction form
    21,138.64/29,171.37 = 11,707.36/x
  3. Step 3: Cross multiply
    21,138.64x = 29,171.37 × 11,707.36
  4. Step 4: Simplify right side
    21,138.64x = 341,519,730.28
  5. Step 5: Solve for x
    x = 341,519,730.28/21,138.64
  6. Step 6: Final answer
    x = 16,156.18

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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.