Home / 13,187.72-18,190.86-8,153.48

Finding the Fourth Proportional to 13,187.72, 18,190.86 and 8,153.48

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Solution

The fourth proportional to 13,187.72, 18,190.86 and 8,153.48 is: 11,246.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.72 : 18,190.86 = 8,153.48 : x
  2. Step 2: Convert to fraction form
    13,187.72/18,190.86 = 8,153.48/x
  3. Step 3: Cross multiply
    13,187.72x = 18,190.86 × 8,153.48
  4. Step 4: Simplify right side
    13,187.72x = 148,318,813.19
  5. Step 5: Solve for x
    x = 148,318,813.19/13,187.72
  6. Step 6: Final answer
    x = 11,246.74

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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.