Home / 13,743.99-18,968.06-9,918.79

Finding the Fourth Proportional to 13,743.99, 18,968.06 and 9,918.79

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Solution

The fourth proportional to 13,743.99, 18,968.06 and 9,918.79 is: 13,688.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,743.99 : 18,968.06 = 9,918.79 : x
  2. Step 2: Convert to fraction form
    13,743.99/18,968.06 = 9,918.79/x
  3. Step 3: Cross multiply
    13,743.99x = 18,968.06 × 9,918.79
  4. Step 4: Simplify right side
    13,743.99x = 188,140,181.22
  5. Step 5: Solve for x
    x = 188,140,181.22/13,743.99
  6. Step 6: Final answer
    x = 13,688.91

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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.