Home / 28,819.89-39,771.45-15,571.89

Finding the Fourth Proportional to 28,819.89, 39,771.45 and 15,571.89

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Solution

The fourth proportional to 28,819.89, 39,771.45 and 15,571.89 is: 21,489.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,819.89 : 39,771.45 = 15,571.89 : x
  2. Step 2: Convert to fraction form
    28,819.89/39,771.45 = 15,571.89/x
  3. Step 3: Cross multiply
    28,819.89x = 39,771.45 × 15,571.89
  4. Step 4: Simplify right side
    28,819.89x = 619,316,644.54
  5. Step 5: Solve for x
    x = 619,316,644.54/28,819.89
  6. Step 6: Final answer
    x = 21,489.21

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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.