Home / 21,778.66-30,043.47-12,825.73

Finding the Fourth Proportional to 21,778.66, 30,043.47 and 12,825.73

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Solution

The fourth proportional to 21,778.66, 30,043.47 and 12,825.73 is: 17,692.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,778.66 : 30,043.47 = 12,825.73 : x
  2. Step 2: Convert to fraction form
    21,778.66/30,043.47 = 12,825.73/x
  3. Step 3: Cross multiply
    21,778.66x = 30,043.47 × 12,825.73
  4. Step 4: Simplify right side
    21,778.66x = 385,329,434.48
  5. Step 5: Solve for x
    x = 385,329,434.48/21,778.66
  6. Step 6: Final answer
    x = 17,692.98

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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.