Home / 21,216.92-31,813.16-8,745.55

Finding the Fourth Proportional to 21,216.92, 31,813.16 and 8,745.55

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Solution

The fourth proportional to 21,216.92, 31,813.16 and 8,745.55 is: 13,113.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.92 : 31,813.16 = 8,745.55 : x
  2. Step 2: Convert to fraction form
    21,216.92/31,813.16 = 8,745.55/x
  3. Step 3: Cross multiply
    21,216.92x = 31,813.16 × 8,745.55
  4. Step 4: Simplify right side
    21,216.92x = 278,223,458.18
  5. Step 5: Solve for x
    x = 278,223,458.18/21,216.92
  6. Step 6: Final answer
    x = 13,113.29

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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.