Home / 12,768.40-17,619.36-7,103.16

Finding the Fourth Proportional to 12,768.40, 17,619.36 and 7,103.16

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Solution

The fourth proportional to 12,768.40, 17,619.36 and 7,103.16 is: 9,801.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,768.40 : 17,619.36 = 7,103.16 : x
  2. Step 2: Convert to fraction form
    12,768.40/17,619.36 = 7,103.16/x
  3. Step 3: Cross multiply
    12,768.40x = 17,619.36 × 7,103.16
  4. Step 4: Simplify right side
    12,768.40x = 125,153,106.54
  5. Step 5: Solve for x
    x = 125,153,106.54/12,768.40
  6. Step 6: Final answer
    x = 9,801.78

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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.