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Finding the Fourth Proportional to 4,068.40, 5,539 and 4,055.80

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Solution

The fourth proportional to 4,068.40, 5,539 and 4,055.80 is: 5,521.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,068.40 : 5,539 = 4,055.80 : x
  2. Step 2: Convert to fraction form
    4,068.40/5,539 = 4,055.80/x
  3. Step 3: Cross multiply
    4,068.40x = 5,539 × 4,055.80
  4. Step 4: Simplify right side
    4,068.40x = 22,465,076.20
  5. Step 5: Solve for x
    x = 22,465,076.20/4,068.40
  6. Step 6: Final answer
    x = 5,521.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.