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Finding the Fourth Proportional to 7,080.70, 10,621 and 1,815.70

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Solution

The fourth proportional to 7,080.70, 10,621 and 1,815.70 is: 2,723.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,080.70 : 10,621 = 1,815.70 : x
  2. Step 2: Convert to fraction form
    7,080.70/10,621 = 1,815.70/x
  3. Step 3: Cross multiply
    7,080.70x = 10,621 × 1,815.70
  4. Step 4: Simplify right side
    7,080.70x = 19,284,549.70
  5. Step 5: Solve for x
    x = 19,284,549.70/7,080.70
  6. Step 6: Final answer
    x = 2,723.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.