Home / 13,670.76-18,918.82-13,440.36

Finding the Fourth Proportional to 13,670.76, 18,918.82 and 13,440.36

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Solution

The fourth proportional to 13,670.76, 18,918.82 and 13,440.36 is: 18,599.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.76 : 18,918.82 = 13,440.36 : x
  2. Step 2: Convert to fraction form
    13,670.76/18,918.82 = 13,440.36/x
  3. Step 3: Cross multiply
    13,670.76x = 18,918.82 × 13,440.36
  4. Step 4: Simplify right side
    13,670.76x = 254,275,751.58
  5. Step 5: Solve for x
    x = 254,275,751.58/13,670.76
  6. Step 6: Final answer
    x = 18,599.97

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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.