Home / 28,243.89-42,372.90-19,940.12

Finding the Fourth Proportional to 28,243.89, 42,372.90 and 19,940.12

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Solution

The fourth proportional to 28,243.89, 42,372.90 and 19,940.12 is: 29,915.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,243.89 : 42,372.90 = 19,940.12 : x
  2. Step 2: Convert to fraction form
    28,243.89/42,372.90 = 19,940.12/x
  3. Step 3: Cross multiply
    28,243.89x = 42,372.90 × 19,940.12
  4. Step 4: Simplify right side
    28,243.89x = 844,920,840.05
  5. Step 5: Solve for x
    x = 844,920,840.05/28,243.89
  6. Step 6: Final answer
    x = 29,915.17

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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.