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Finding the Fourth Proportional to 12,669.48, 18,997.40 and 8,978.92

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Solution

The fourth proportional to 12,669.48, 18,997.40 and 8,978.92 is: 13,463.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,669.48 : 18,997.40 = 8,978.92 : x
  2. Step 2: Convert to fraction form
    12,669.48/18,997.40 = 8,978.92/x
  3. Step 3: Cross multiply
    12,669.48x = 18,997.40 × 8,978.92
  4. Step 4: Simplify right side
    12,669.48x = 170,576,109.76
  5. Step 5: Solve for x
    x = 170,576,109.76/12,669.48
  6. Step 6: Final answer
    x = 13,463.54

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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.