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Finding the Fourth Proportional to 12,601.89, 17,391.38 and 7,012.89

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Solution

The fourth proportional to 12,601.89, 17,391.38 and 7,012.89 is: 9,678.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,601.89 : 17,391.38 = 7,012.89 : x
  2. Step 2: Convert to fraction form
    12,601.89/17,391.38 = 7,012.89/x
  3. Step 3: Cross multiply
    12,601.89x = 17,391.38 × 7,012.89
  4. Step 4: Simplify right side
    12,601.89x = 121,963,799.82
  5. Step 5: Solve for x
    x = 121,963,799.82/12,601.89
  6. Step 6: Final answer
    x = 9,678.21

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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.