Home / 4,878.60-7,328.70-3,420.60

Finding the Fourth Proportional to 4,878.60, 7,328.70 and 3,420.60

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Solution

The fourth proportional to 4,878.60, 7,328.70 and 3,420.60 is: 5,138.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,878.60 : 7,328.70 = 3,420.60 : x
  2. Step 2: Convert to fraction form
    4,878.60/7,328.70 = 3,420.60/x
  3. Step 3: Cross multiply
    4,878.60x = 7,328.70 × 3,420.60
  4. Step 4: Simplify right side
    4,878.60x = 25,068,551.22
  5. Step 5: Solve for x
    x = 25,068,551.22/4,878.60
  6. Step 6: Final answer
    x = 5,138.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.