Home / 21,183.78-31,725.56-18,395.31

Finding the Fourth Proportional to 21,183.78, 31,725.56 and 18,395.31

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Solution

The fourth proportional to 21,183.78, 31,725.56 and 18,395.31 is: 27,549.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.78 : 31,725.56 = 18,395.31 : x
  2. Step 2: Convert to fraction form
    21,183.78/31,725.56 = 18,395.31/x
  3. Step 3: Cross multiply
    21,183.78x = 31,725.56 × 18,395.31
  4. Step 4: Simplify right side
    21,183.78x = 583,601,511.12
  5. Step 5: Solve for x
    x = 583,601,511.12/21,183.78
  6. Step 6: Final answer
    x = 27,549.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.