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Finding the Fourth Proportional to 5,173, 7,138.83 and 2,815.18

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Solution

The fourth proportional to 5,173, 7,138.83 and 2,815.18 is: 3,885.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173 : 7,138.83 = 2,815.18 : x
  2. Step 2: Convert to fraction form
    5,173/7,138.83 = 2,815.18/x
  3. Step 3: Cross multiply
    5,173x = 7,138.83 × 2,815.18
  4. Step 4: Simplify right side
    5,173x = 20,097,091.44
  5. Step 5: Solve for x
    x = 20,097,091.44/5,173
  6. Step 6: Final answer
    x = 3,885.00

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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.