Home / 12,718.33-17,550.34-7,128.25

Finding the Fourth Proportional to 12,718.33, 17,550.34 and 7,128.25

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Solution

The fourth proportional to 12,718.33, 17,550.34 and 7,128.25 is: 9,836.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,718.33 : 17,550.34 = 7,128.25 : x
  2. Step 2: Convert to fraction form
    12,718.33/17,550.34 = 7,128.25/x
  3. Step 3: Cross multiply
    12,718.33x = 17,550.34 × 7,128.25
  4. Step 4: Simplify right side
    12,718.33x = 125,103,211.11
  5. Step 5: Solve for x
    x = 125,103,211.11/12,718.33
  6. Step 6: Final answer
    x = 9,836.45

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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.