Home / 21,305.28-29,399.52-13,335.36

Finding the Fourth Proportional to 21,305.28, 29,399.52 and 13,335.36

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Solution

The fourth proportional to 21,305.28, 29,399.52 and 13,335.36 is: 18,401.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.28 : 29,399.52 = 13,335.36 : x
  2. Step 2: Convert to fraction form
    21,305.28/29,399.52 = 13,335.36/x
  3. Step 3: Cross multiply
    21,305.28x = 29,399.52 × 13,335.36
  4. Step 4: Simplify right side
    21,305.28x = 392,053,183.03
  5. Step 5: Solve for x
    x = 392,053,183.03/21,305.28
  6. Step 6: Final answer
    x = 18,401.69

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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.