Home / 28,517.70-39,353.72-15,771.60

Finding the Fourth Proportional to 28,517.70, 39,353.72 and 15,771.60

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Solution

The fourth proportional to 28,517.70, 39,353.72 and 15,771.60 is: 21,764.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,517.70 : 39,353.72 = 15,771.60 : x
  2. Step 2: Convert to fraction form
    28,517.70/39,353.72 = 15,771.60/x
  3. Step 3: Cross multiply
    28,517.70x = 39,353.72 × 15,771.60
  4. Step 4: Simplify right side
    28,517.70x = 620,671,051.49
  5. Step 5: Solve for x
    x = 620,671,051.49/28,517.70
  6. Step 6: Final answer
    x = 21,764.41

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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.