Home / 13,518.51-18,668.37-12,782.22

Finding the Fourth Proportional to 13,518.51, 18,668.37 and 12,782.22

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Solution

The fourth proportional to 13,518.51, 18,668.37 and 12,782.22 is: 17,651.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.51 : 18,668.37 = 12,782.22 : x
  2. Step 2: Convert to fraction form
    13,518.51/18,668.37 = 12,782.22/x
  3. Step 3: Cross multiply
    13,518.51x = 18,668.37 × 12,782.22
  4. Step 4: Simplify right side
    13,518.51x = 238,623,212.38
  5. Step 5: Solve for x
    x = 238,623,212.38/13,518.51
  6. Step 6: Final answer
    x = 17,651.59

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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.