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Finding the Fourth Proportional to 5,151, 7,109.19 and 3,054.72

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Solution

The fourth proportional to 5,151, 7,109.19 and 3,054.72 is: 4,215.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151 : 7,109.19 = 3,054.72 : x
  2. Step 2: Convert to fraction form
    5,151/7,109.19 = 3,054.72/x
  3. Step 3: Cross multiply
    5,151x = 7,109.19 × 3,054.72
  4. Step 4: Simplify right side
    5,151x = 21,716,584.88
  5. Step 5: Solve for x
    x = 21,716,584.88/5,151
  6. Step 6: Final answer
    x = 4,215.99

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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.