Home / 3,128,515.12-4,315,120.59-2,871,221.42

Finding the Fourth Proportional to 3,128,515.12, 4,315,120.59 and 2,871,221.42

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Solution

The fourth proportional to 3,128,515.12, 4,315,120.59 and 2,871,221.42 is: 3,960,238.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128,515.12 : 4,315,120.59 = 2,871,221.42 : x
  2. Step 2: Convert to fraction form
    3,128,515.12/4,315,120.59 = 2,871,221.42/x
  3. Step 3: Cross multiply
    3,128,515.12x = 4,315,120.59 × 2,871,221.42
  4. Step 4: Simplify right side
    3,128,515.12x = 12,389,666,667,891.04
  5. Step 5: Solve for x
    x = 12,389,666,667,891.04/3,128,515.12
  6. Step 6: Final answer
    x = 3,960,238.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.