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Finding the Fourth Proportional to 12,795.78, 17,658.30 and 7,206.78

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Solution

The fourth proportional to 12,795.78, 17,658.30 and 7,206.78 is: 9,945.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,795.78 : 17,658.30 = 7,206.78 : x
  2. Step 2: Convert to fraction form
    12,795.78/17,658.30 = 7,206.78/x
  3. Step 3: Cross multiply
    12,795.78x = 17,658.30 × 7,206.78
  4. Step 4: Simplify right side
    12,795.78x = 127,259,483.27
  5. Step 5: Solve for x
    x = 127,259,483.27/12,795.78
  6. Step 6: Final answer
    x = 9,945.43

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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.