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Finding the Fourth Proportional to 19,266.88, 28,948.96 and 18,489.28

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Solution

The fourth proportional to 19,266.88, 28,948.96 and 18,489.28 is: 27,780.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,266.88 : 28,948.96 = 18,489.28 : x
  2. Step 2: Convert to fraction form
    19,266.88/28,948.96 = 18,489.28/x
  3. Step 3: Cross multiply
    19,266.88x = 28,948.96 × 18,489.28
  4. Step 4: Simplify right side
    19,266.88x = 535,245,427.15
  5. Step 5: Solve for x
    x = 535,245,427.15/19,266.88
  6. Step 6: Final answer
    x = 27,780.60

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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.