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Finding the Fourth Proportional to 12,897.96, 19,353.96 and 9,981.96

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Solution

The fourth proportional to 12,897.96, 19,353.96 and 9,981.96 is: 14,978.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,897.96 : 19,353.96 = 9,981.96 : x
  2. Step 2: Convert to fraction form
    12,897.96/19,353.96 = 9,981.96/x
  3. Step 3: Cross multiply
    12,897.96x = 19,353.96 × 9,981.96
  4. Step 4: Simplify right side
    12,897.96x = 193,190,454.56
  5. Step 5: Solve for x
    x = 193,190,454.56/12,897.96
  6. Step 6: Final answer
    x = 14,978.37

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1.5x scale

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.