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Finding the Fourth Proportional to 4,994.49, 6,889.53 and 3,128.25

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Solution

The fourth proportional to 4,994.49, 6,889.53 and 3,128.25 is: 4,315.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,994.49 : 6,889.53 = 3,128.25 : x
  2. Step 2: Convert to fraction form
    4,994.49/6,889.53 = 3,128.25/x
  3. Step 3: Cross multiply
    4,994.49x = 6,889.53 × 3,128.25
  4. Step 4: Simplify right side
    4,994.49x = 21,552,172.22
  5. Step 5: Solve for x
    x = 21,552,172.22/4,994.49
  6. Step 6: Final answer
    x = 4,315.19

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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.