Home / 13,218.10-18,231.42-11,225.50

Finding the Fourth Proportional to 13,218.10, 18,231.42 and 11,225.50

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Solution

The fourth proportional to 13,218.10, 18,231.42 and 11,225.50 is: 15,483.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.10 : 18,231.42 = 11,225.50 : x
  2. Step 2: Convert to fraction form
    13,218.10/18,231.42 = 11,225.50/x
  3. Step 3: Cross multiply
    13,218.10x = 18,231.42 × 11,225.50
  4. Step 4: Simplify right side
    13,218.10x = 204,656,749.08
  5. Step 5: Solve for x
    x = 204,656,749.08/13,218.10
  6. Step 6: Final answer
    x = 15,483.07

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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.