Home / 20,840.37-31,251.09-8,988.54

Finding the Fourth Proportional to 20,840.37, 31,251.09 and 8,988.54

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Solution

The fourth proportional to 20,840.37, 31,251.09 and 8,988.54 is: 13,478.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.37 : 31,251.09 = 8,988.54 : x
  2. Step 2: Convert to fraction form
    20,840.37/31,251.09 = 8,988.54/x
  3. Step 3: Cross multiply
    20,840.37x = 31,251.09 × 8,988.54
  4. Step 4: Simplify right side
    20,840.37x = 280,901,672.51
  5. Step 5: Solve for x
    x = 280,901,672.51/20,840.37
  6. Step 6: Final answer
    x = 13,478.73

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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.