Home / 20,940.90-31,411.35-18,608.10

Finding the Fourth Proportional to 20,940.90, 31,411.35 and 18,608.10

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Solution

The fourth proportional to 20,940.90, 31,411.35 and 18,608.10 is: 27,912.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.90 : 31,411.35 = 18,608.10 : x
  2. Step 2: Convert to fraction form
    20,940.90/31,411.35 = 18,608.10/x
  3. Step 3: Cross multiply
    20,940.90x = 31,411.35 × 18,608.10
  4. Step 4: Simplify right side
    20,940.90x = 584,505,541.94
  5. Step 5: Solve for x
    x = 584,505,541.94/20,940.90
  6. Step 6: Final answer
    x = 27,912.15

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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.