Home / 21,163.82-31,683.41-15,641.78

Finding the Fourth Proportional to 21,163.82, 31,683.41 and 15,641.78

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Solution

The fourth proportional to 21,163.82, 31,683.41 and 15,641.78 is: 23,416.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.82 : 31,683.41 = 15,641.78 : x
  2. Step 2: Convert to fraction form
    21,163.82/31,683.41 = 15,641.78/x
  3. Step 3: Cross multiply
    21,163.82x = 31,683.41 × 15,641.78
  4. Step 4: Simplify right side
    21,163.82x = 495,584,692.24
  5. Step 5: Solve for x
    x = 495,584,692.24/21,163.82
  6. Step 6: Final answer
    x = 23,416.60

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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.