Home / 5,415.03-8,109.75-2,643.60

Finding the Fourth Proportional to 5,415.03, 8,109.75 and 2,643.60

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Solution

The fourth proportional to 5,415.03, 8,109.75 and 2,643.60 is: 3,959.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.03 : 8,109.75 = 2,643.60 : x
  2. Step 2: Convert to fraction form
    5,415.03/8,109.75 = 2,643.60/x
  3. Step 3: Cross multiply
    5,415.03x = 8,109.75 × 2,643.60
  4. Step 4: Simplify right side
    5,415.03x = 21,438,935.10
  5. Step 5: Solve for x
    x = 21,438,935.10/5,415.03
  6. Step 6: Final answer
    x = 3,959.15

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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.