Home / 7,145.75-10,720.45-2,215.45

Finding the Fourth Proportional to 7,145.75, 10,720.45 and 2,215.45

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Solution

The fourth proportional to 7,145.75, 10,720.45 and 2,215.45 is: 3,323.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.75 : 10,720.45 = 2,215.45 : x
  2. Step 2: Convert to fraction form
    7,145.75/10,720.45 = 2,215.45/x
  3. Step 3: Cross multiply
    7,145.75x = 10,720.45 × 2,215.45
  4. Step 4: Simplify right side
    7,145.75x = 23,750,637.12
  5. Step 5: Solve for x
    x = 23,750,637.12/7,145.75
  6. Step 6: Final answer
    x = 3,323.74

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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.