Home / 5,538.80-7,643.40-3,180.80

Finding the Fourth Proportional to 5,538.80, 7,643.40 and 3,180.80

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Solution

The fourth proportional to 5,538.80, 7,643.40 and 3,180.80 is: 4,389.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,538.80 : 7,643.40 = 3,180.80 : x
  2. Step 2: Convert to fraction form
    5,538.80/7,643.40 = 3,180.80/x
  3. Step 3: Cross multiply
    5,538.80x = 7,643.40 × 3,180.80
  4. Step 4: Simplify right side
    5,538.80x = 24,312,126.72
  5. Step 5: Solve for x
    x = 24,312,126.72/5,538.80
  6. Step 6: Final answer
    x = 4,389.42

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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.