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Finding the Fourth Proportional to 17,938.98, 26,908.53 and 8,698.50

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Solution

The fourth proportional to 17,938.98, 26,908.53 and 8,698.50 is: 13,047.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,938.98 : 26,908.53 = 8,698.50 : x
  2. Step 2: Convert to fraction form
    17,938.98/26,908.53 = 8,698.50/x
  3. Step 3: Cross multiply
    17,938.98x = 26,908.53 × 8,698.50
  4. Step 4: Simplify right side
    17,938.98x = 234,063,848.21
  5. Step 5: Solve for x
    x = 234,063,848.21/17,938.98
  6. Step 6: Final answer
    x = 13,047.78

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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.