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Finding the Fourth Proportional to 13,321.58, 18,372.49 and 8,015.40

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Solution

The fourth proportional to 13,321.58, 18,372.49 and 8,015.40 is: 11,054.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.58 : 18,372.49 = 8,015.40 : x
  2. Step 2: Convert to fraction form
    13,321.58/18,372.49 = 8,015.40/x
  3. Step 3: Cross multiply
    13,321.58x = 18,372.49 × 8,015.40
  4. Step 4: Simplify right side
    13,321.58x = 147,262,836.31
  5. Step 5: Solve for x
    x = 147,262,836.31/13,321.58
  6. Step 6: Final answer
    x = 11,054.46

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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.