Home / 13,421.84-18,521.26-8,119.58

Finding the Fourth Proportional to 13,421.84, 18,521.26 and 8,119.58

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Solution

The fourth proportional to 13,421.84, 18,521.26 and 8,119.58 is: 11,204.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.84 : 18,521.26 = 8,119.58 : x
  2. Step 2: Convert to fraction form
    13,421.84/18,521.26 = 8,119.58/x
  3. Step 3: Cross multiply
    13,421.84x = 18,521.26 × 8,119.58
  4. Step 4: Simplify right side
    13,421.84x = 150,384,739.37
  5. Step 5: Solve for x
    x = 150,384,739.37/13,421.84
  6. Step 6: Final answer
    x = 11,204.48

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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.