Home / 3,388.48-4,678.98-2,131.64

Finding the Fourth Proportional to 3,388.48, 4,678.98 and 2,131.64

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Solution

The fourth proportional to 3,388.48, 4,678.98 and 2,131.64 is: 2,943.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,388.48 : 4,678.98 = 2,131.64 : x
  2. Step 2: Convert to fraction form
    3,388.48/4,678.98 = 2,131.64/x
  3. Step 3: Cross multiply
    3,388.48x = 4,678.98 × 2,131.64
  4. Step 4: Simplify right side
    3,388.48x = 9,973,885.53
  5. Step 5: Solve for x
    x = 9,973,885.53/3,388.48
  6. Step 6: Final answer
    x = 2,943.47

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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.