Home / 12,922.20-19,383.30-10,978.20

Finding the Fourth Proportional to 12,922.20, 19,383.30 and 10,978.20

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Solution

The fourth proportional to 12,922.20, 19,383.30 and 10,978.20 is: 16,467.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,922.20 : 19,383.30 = 10,978.20 : x
  2. Step 2: Convert to fraction form
    12,922.20/19,383.30 = 10,978.20/x
  3. Step 3: Cross multiply
    12,922.20x = 19,383.30 × 10,978.20
  4. Step 4: Simplify right side
    12,922.20x = 212,793,744.06
  5. Step 5: Solve for x
    x = 212,793,744.06/12,922.20
  6. Step 6: Final answer
    x = 16,467.30

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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.