Home / 5,109.90-7,660.96-2,643.15

Finding the Fourth Proportional to 5,109.90, 7,660.96 and 2,643.15

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Solution

The fourth proportional to 5,109.90, 7,660.96 and 2,643.15 is: 3,962.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.90 : 7,660.96 = 2,643.15 : x
  2. Step 2: Convert to fraction form
    5,109.90/7,660.96 = 2,643.15/x
  3. Step 3: Cross multiply
    5,109.90x = 7,660.96 × 2,643.15
  4. Step 4: Simplify right side
    5,109.90x = 20,249,014.90
  5. Step 5: Solve for x
    x = 20,249,014.90/5,109.90
  6. Step 6: Final answer
    x = 3,962.70

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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.