Home / 20,485.89-28,270.22-11,533.37

Finding the Fourth Proportional to 20,485.89, 28,270.22 and 11,533.37

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Solution

The fourth proportional to 20,485.89, 28,270.22 and 11,533.37 is: 15,915.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.89 : 28,270.22 = 11,533.37 : x
  2. Step 2: Convert to fraction form
    20,485.89/28,270.22 = 11,533.37/x
  3. Step 3: Cross multiply
    20,485.89x = 28,270.22 × 11,533.37
  4. Step 4: Simplify right side
    20,485.89x = 326,050,708.22
  5. Step 5: Solve for x
    x = 326,050,708.22/20,485.89
  6. Step 6: Final answer
    x = 15,915.87

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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.