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Finding the Fourth Proportional to 12,894.09, 17,792.28 and 7,228.38

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Solution

The fourth proportional to 12,894.09, 17,792.28 and 7,228.38 is: 9,974.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,894.09 : 17,792.28 = 7,228.38 : x
  2. Step 2: Convert to fraction form
    12,894.09/17,792.28 = 7,228.38/x
  3. Step 3: Cross multiply
    12,894.09x = 17,792.28 × 7,228.38
  4. Step 4: Simplify right side
    12,894.09x = 128,609,360.91
  5. Step 5: Solve for x
    x = 128,609,360.91/12,894.09
  6. Step 6: Final answer
    x = 9,974.29

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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.