Home / 18,285.87-27,420.15-8,422.23

Finding the Fourth Proportional to 18,285.87, 27,420.15 and 8,422.23

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Solution

The fourth proportional to 18,285.87, 27,420.15 and 8,422.23 is: 12,629.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285.87 : 27,420.15 = 8,422.23 : x
  2. Step 2: Convert to fraction form
    18,285.87/27,420.15 = 8,422.23/x
  3. Step 3: Cross multiply
    18,285.87x = 27,420.15 × 8,422.23
  4. Step 4: Simplify right side
    18,285.87x = 230,938,809.93
  5. Step 5: Solve for x
    x = 230,938,809.93/18,285.87
  6. Step 6: Final answer
    x = 12,629.36

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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.