Home / 21,330.20-31,995.30-19,645.40

Finding the Fourth Proportional to 21,330.20, 31,995.30 and 19,645.40

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Solution

The fourth proportional to 21,330.20, 31,995.30 and 19,645.40 is: 29,468.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.20 : 31,995.30 = 19,645.40 : x
  2. Step 2: Convert to fraction form
    21,330.20/31,995.30 = 19,645.40/x
  3. Step 3: Cross multiply
    21,330.20x = 31,995.30 × 19,645.40
  4. Step 4: Simplify right side
    21,330.20x = 628,560,466.62
  5. Step 5: Solve for x
    x = 628,560,466.62/21,330.20
  6. Step 6: Final answer
    x = 29,468.10

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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.