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Finding the Fourth Proportional to 7,615, 11,422.14 and 2,420.20

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Solution

The fourth proportional to 7,615, 11,422.14 and 2,420.20 is: 3,630.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,615 : 11,422.14 = 2,420.20 : x
  2. Step 2: Convert to fraction form
    7,615/11,422.14 = 2,420.20/x
  3. Step 3: Cross multiply
    7,615x = 11,422.14 × 2,420.20
  4. Step 4: Simplify right side
    7,615x = 27,643,863.23
  5. Step 5: Solve for x
    x = 27,643,863.23/7,615
  6. Step 6: Final answer
    x = 3,630.19

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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.