Home / 31,450.78-43,394.40-19,961.50

Finding the Fourth Proportional to 31,450.78, 43,394.40 and 19,961.50

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Solution

The fourth proportional to 31,450.78, 43,394.40 and 19,961.50 is: 27,542.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,450.78 : 43,394.40 = 19,961.50 : x
  2. Step 2: Convert to fraction form
    31,450.78/43,394.40 = 19,961.50/x
  3. Step 3: Cross multiply
    31,450.78x = 43,394.40 × 19,961.50
  4. Step 4: Simplify right side
    31,450.78x = 866,217,315.60
  5. Step 5: Solve for x
    x = 866,217,315.60/31,450.78
  6. Step 6: Final answer
    x = 27,542.00

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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.