Home / 15,286.56-21,090.64-8,571.20

Finding the Fourth Proportional to 15,286.56, 21,090.64 and 8,571.20

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Solution

The fourth proportional to 15,286.56, 21,090.64 and 8,571.20 is: 11,825.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,286.56 : 21,090.64 = 8,571.20 : x
  2. Step 2: Convert to fraction form
    15,286.56/21,090.64 = 8,571.20/x
  3. Step 3: Cross multiply
    15,286.56x = 21,090.64 × 8,571.20
  4. Step 4: Simplify right side
    15,286.56x = 180,772,093.57
  5. Step 5: Solve for x
    x = 180,772,093.57/15,286.56
  6. Step 6: Final answer
    x = 11,825.56

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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.