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Finding the Fourth Proportional to 18,916.88, 28,362.96 and 9,055.84

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Solution

The fourth proportional to 18,916.88, 28,362.96 and 9,055.84 is: 13,577.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.88 : 28,362.96 = 9,055.84 : x
  2. Step 2: Convert to fraction form
    18,916.88/28,362.96 = 9,055.84/x
  3. Step 3: Cross multiply
    18,916.88x = 28,362.96 × 9,055.84
  4. Step 4: Simplify right side
    18,916.88x = 256,850,427.69
  5. Step 5: Solve for x
    x = 256,850,427.69/18,916.88
  6. Step 6: Final answer
    x = 13,577.84

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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.