Home / 21,731.36-29,989.92-12,301.28

Finding the Fourth Proportional to 21,731.36, 29,989.92 and 12,301.28

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Solution

The fourth proportional to 21,731.36, 29,989.92 and 12,301.28 is: 16,976.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.36 : 29,989.92 = 12,301.28 : x
  2. Step 2: Convert to fraction form
    21,731.36/29,989.92 = 12,301.28/x
  3. Step 3: Cross multiply
    21,731.36x = 29,989.92 × 12,301.28
  4. Step 4: Simplify right side
    21,731.36x = 368,914,403.10
  5. Step 5: Solve for x
    x = 368,914,403.10/21,731.36
  6. Step 6: Final answer
    x = 16,976.13

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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.