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Finding the Fourth Proportional to 12,939.48, 17,856.48 and 7,350.48

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Solution

The fourth proportional to 12,939.48, 17,856.48 and 7,350.48 is: 10,143.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.48 : 17,856.48 = 7,350.48 : x
  2. Step 2: Convert to fraction form
    12,939.48/17,856.48 = 7,350.48/x
  3. Step 3: Cross multiply
    12,939.48x = 17,856.48 × 7,350.48
  4. Step 4: Simplify right side
    12,939.48x = 131,253,699.11
  5. Step 5: Solve for x
    x = 131,253,699.11/12,939.48
  6. Step 6: Final answer
    x = 10,143.66

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1.5x scale

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.