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Finding the Fourth Proportional to 18,975.33, 28,466.06 and 7,130.03

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Solution

The fourth proportional to 18,975.33, 28,466.06 and 7,130.03 is: 10,696.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,975.33 : 28,466.06 = 7,130.03 : x
  2. Step 2: Convert to fraction form
    18,975.33/28,466.06 = 7,130.03/x
  3. Step 3: Cross multiply
    18,975.33x = 28,466.06 × 7,130.03
  4. Step 4: Simplify right side
    18,975.33x = 202,963,683.80
  5. Step 5: Solve for x
    x = 202,963,683.80/18,975.33
  6. Step 6: Final answer
    x = 10,696.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.