Home / 3,135.40-4,697.70-2,039.20

Finding the Fourth Proportional to 3,135.40, 4,697.70 and 2,039.20

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Solution

The fourth proportional to 3,135.40, 4,697.70 and 2,039.20 is: 3,055.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,135.40 : 4,697.70 = 2,039.20 : x
  2. Step 2: Convert to fraction form
    3,135.40/4,697.70 = 2,039.20/x
  3. Step 3: Cross multiply
    3,135.40x = 4,697.70 × 2,039.20
  4. Step 4: Simplify right side
    3,135.40x = 9,579,549.84
  5. Step 5: Solve for x
    x = 9,579,549.84/3,135.40
  6. Step 6: Final answer
    x = 3,055.29

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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.