Home / 3,015.12-4,529.58-2,139.78

Finding the Fourth Proportional to 3,015.12, 4,529.58 and 2,139.78

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Solution

The fourth proportional to 3,015.12, 4,529.58 and 2,139.78 is: 3,214.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015.12 : 4,529.58 = 2,139.78 : x
  2. Step 2: Convert to fraction form
    3,015.12/4,529.58 = 2,139.78/x
  3. Step 3: Cross multiply
    3,015.12x = 4,529.58 × 2,139.78
  4. Step 4: Simplify right side
    3,015.12x = 9,692,304.69
  5. Step 5: Solve for x
    x = 9,692,304.69/3,015.12
  6. Step 6: Final answer
    x = 3,214.57

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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.