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Finding the Fourth Proportional to 12,409.79, 17,126.28 and 7,104.49

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Solution

The fourth proportional to 12,409.79, 17,126.28 and 7,104.49 is: 9,804.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,409.79 : 17,126.28 = 7,104.49 : x
  2. Step 2: Convert to fraction form
    12,409.79/17,126.28 = 7,104.49/x
  3. Step 3: Cross multiply
    12,409.79x = 17,126.28 × 7,104.49
  4. Step 4: Simplify right side
    12,409.79x = 121,673,442.18
  5. Step 5: Solve for x
    x = 121,673,442.18/12,409.79
  6. Step 6: Final answer
    x = 9,804.64

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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.