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Finding the Fourth Proportional to 18,683.21, 25,758 and 15,484.52

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Solution

The fourth proportional to 18,683.21, 25,758 and 15,484.52 is: 21,348.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.21 : 25,758 = 15,484.52 : x
  2. Step 2: Convert to fraction form
    18,683.21/25,758 = 15,484.52/x
  3. Step 3: Cross multiply
    18,683.21x = 25,758 × 15,484.52
  4. Step 4: Simplify right side
    18,683.21x = 398,850,266.16
  5. Step 5: Solve for x
    x = 398,850,266.16/18,683.21
  6. Step 6: Final answer
    x = 21,348.06

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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.