Home / 3,988.70-5,499.39-3,428.06

Finding the Fourth Proportional to 3,988.70, 5,499.39 and 3,428.06

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Solution

The fourth proportional to 3,988.70, 5,499.39 and 3,428.06 is: 4,726.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.70 : 5,499.39 = 3,428.06 : x
  2. Step 2: Convert to fraction form
    3,988.70/5,499.39 = 3,428.06/x
  3. Step 3: Cross multiply
    3,988.70x = 5,499.39 × 3,428.06
  4. Step 4: Simplify right side
    3,988.70x = 18,852,238.88
  5. Step 5: Solve for x
    x = 18,852,238.88/3,988.70
  6. Step 6: Final answer
    x = 4,726.41

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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.