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Finding the Fourth Proportional to 18,978.96, 26,153.64 and 14,507.76

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Solution

The fourth proportional to 18,978.96, 26,153.64 and 14,507.76 is: 19,992.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.96 : 26,153.64 = 14,507.76 : x
  2. Step 2: Convert to fraction form
    18,978.96/26,153.64 = 14,507.76/x
  3. Step 3: Cross multiply
    18,978.96x = 26,153.64 × 14,507.76
  4. Step 4: Simplify right side
    18,978.96x = 379,430,732.25
  5. Step 5: Solve for x
    x = 379,430,732.25/18,978.96
  6. Step 6: Final answer
    x = 19,992.18

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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.