Home / 12,887.64-17,745.40-11,285.12

Finding the Fourth Proportional to 12,887.64, 17,745.40 and 11,285.12

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Solution

The fourth proportional to 12,887.64, 17,745.40 and 11,285.12 is: 15,538.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,887.64 : 17,745.40 = 11,285.12 : x
  2. Step 2: Convert to fraction form
    12,887.64/17,745.40 = 11,285.12/x
  3. Step 3: Cross multiply
    12,887.64x = 17,745.40 × 11,285.12
  4. Step 4: Simplify right side
    12,887.64x = 200,258,968.45
  5. Step 5: Solve for x
    x = 200,258,968.45/12,887.64
  6. Step 6: Final answer
    x = 15,538.84

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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.