Home / 3,387.48-4,673.88-2,128.74

Finding the Fourth Proportional to 3,387.48, 4,673.88 and 2,128.74

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Solution

The fourth proportional to 3,387.48, 4,673.88 and 2,128.74 is: 2,937.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.48 : 4,673.88 = 2,128.74 : x
  2. Step 2: Convert to fraction form
    3,387.48/4,673.88 = 2,128.74/x
  3. Step 3: Cross multiply
    3,387.48x = 4,673.88 × 2,128.74
  4. Step 4: Simplify right side
    3,387.48x = 9,949,475.31
  5. Step 5: Solve for x
    x = 9,949,475.31/3,387.48
  6. Step 6: Final answer
    x = 2,937.13

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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.