Home / 28,231.76-42,489.12-21,247.94

Finding the Fourth Proportional to 28,231.76, 42,489.12 and 21,247.94

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Solution

The fourth proportional to 28,231.76, 42,489.12 and 21,247.94 is: 31,978.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,231.76 : 42,489.12 = 21,247.94 : x
  2. Step 2: Convert to fraction form
    28,231.76/42,489.12 = 21,247.94/x
  3. Step 3: Cross multiply
    28,231.76x = 42,489.12 × 21,247.94
  4. Step 4: Simplify right side
    28,231.76x = 902,806,059.97
  5. Step 5: Solve for x
    x = 902,806,059.97/28,231.76
  6. Step 6: Final answer
    x = 31,978.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.