Home / 28,664.82-39,576.74-21,938.45

Finding the Fourth Proportional to 28,664.82, 39,576.74 and 21,938.45

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Solution

The fourth proportional to 28,664.82, 39,576.74 and 21,938.45 is: 30,289.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,664.82 : 39,576.74 = 21,938.45 : x
  2. Step 2: Convert to fraction form
    28,664.82/39,576.74 = 21,938.45/x
  3. Step 3: Cross multiply
    28,664.82x = 39,576.74 × 21,938.45
  4. Step 4: Simplify right side
    28,664.82x = 868,252,024.08
  5. Step 5: Solve for x
    x = 868,252,024.08/28,664.82
  6. Step 6: Final answer
    x = 30,289.81

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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.