Home / 21,771.02-30,046.79-12,819.36

Finding the Fourth Proportional to 21,771.02, 30,046.79 and 12,819.36

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Solution

The fourth proportional to 21,771.02, 30,046.79 and 12,819.36 is: 17,692.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,771.02 : 30,046.79 = 12,819.36 : x
  2. Step 2: Convert to fraction form
    21,771.02/30,046.79 = 12,819.36/x
  3. Step 3: Cross multiply
    21,771.02x = 30,046.79 × 12,819.36
  4. Step 4: Simplify right side
    21,771.02x = 385,180,467.62
  5. Step 5: Solve for x
    x = 385,180,467.62/21,771.02
  6. Step 6: Final answer
    x = 17,692.35

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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.