Home / 13,121.81-18,102.93-8,077.26

Finding the Fourth Proportional to 13,121.81, 18,102.93 and 8,077.26

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Solution

The fourth proportional to 13,121.81, 18,102.93 and 8,077.26 is: 11,143.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.81 : 18,102.93 = 8,077.26 : x
  2. Step 2: Convert to fraction form
    13,121.81/18,102.93 = 8,077.26/x
  3. Step 3: Cross multiply
    13,121.81x = 18,102.93 × 8,077.26
  4. Step 4: Simplify right side
    13,121.81x = 146,222,131.32
  5. Step 5: Solve for x
    x = 146,222,131.32/13,121.81
  6. Step 6: Final answer
    x = 11,143.44

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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.