Home / 3,387.49-4,674.53-2,128.50

Finding the Fourth Proportional to 3,387.49, 4,674.53 and 2,128.50

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Solution

The fourth proportional to 3,387.49, 4,674.53 and 2,128.50 is: 2,937.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.49 : 4,674.53 = 2,128.50 : x
  2. Step 2: Convert to fraction form
    3,387.49/4,674.53 = 2,128.50/x
  3. Step 3: Cross multiply
    3,387.49x = 4,674.53 × 2,128.50
  4. Step 4: Simplify right side
    3,387.49x = 9,949,742.43
  5. Step 5: Solve for x
    x = 9,949,742.43/3,387.49
  6. Step 6: Final answer
    x = 2,937.20

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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.