Home / 13,653.21-18,835.34-11,145.68

Finding the Fourth Proportional to 13,653.21, 18,835.34 and 11,145.68

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Solution

The fourth proportional to 13,653.21, 18,835.34 and 11,145.68 is: 15,376.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,653.21 : 18,835.34 = 11,145.68 : x
  2. Step 2: Convert to fraction form
    13,653.21/18,835.34 = 11,145.68/x
  3. Step 3: Cross multiply
    13,653.21x = 18,835.34 × 11,145.68
  4. Step 4: Simplify right side
    13,653.21x = 209,932,747.28
  5. Step 5: Solve for x
    x = 209,932,747.28/13,653.21
  6. Step 6: Final answer
    x = 15,376.07

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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.