Home / 28,311.50-39,072.30-15,738.68

Finding the Fourth Proportional to 28,311.50, 39,072.30 and 15,738.68

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Solution

The fourth proportional to 28,311.50, 39,072.30 and 15,738.68 is: 21,720.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.50 : 39,072.30 = 15,738.68 : x
  2. Step 2: Convert to fraction form
    28,311.50/39,072.30 = 15,738.68/x
  3. Step 3: Cross multiply
    28,311.50x = 39,072.30 × 15,738.68
  4. Step 4: Simplify right side
    28,311.50x = 614,946,426.56
  5. Step 5: Solve for x
    x = 614,946,426.56/28,311.50
  6. Step 6: Final answer
    x = 21,720.73

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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.