Home / 13,378.90-18,421.66-11,884.22

Finding the Fourth Proportional to 13,378.90, 18,421.66 and 11,884.22

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Solution

The fourth proportional to 13,378.90, 18,421.66 and 11,884.22 is: 16,363.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,378.90 : 18,421.66 = 11,884.22 : x
  2. Step 2: Convert to fraction form
    13,378.90/18,421.66 = 11,884.22/x
  3. Step 3: Cross multiply
    13,378.90x = 18,421.66 × 11,884.22
  4. Step 4: Simplify right side
    13,378.90x = 218,926,908.68
  5. Step 5: Solve for x
    x = 218,926,908.68/13,378.90
  6. Step 6: Final answer
    x = 16,363.60

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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.