Home / 7,410.80-11,112.60-4,120.40

Finding the Fourth Proportional to 7,410.80, 11,112.60 and 4,120.40

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Solution

The fourth proportional to 7,410.80, 11,112.60 and 4,120.40 is: 6,178.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,410.80 : 11,112.60 = 4,120.40 : x
  2. Step 2: Convert to fraction form
    7,410.80/11,112.60 = 4,120.40/x
  3. Step 3: Cross multiply
    7,410.80x = 11,112.60 × 4,120.40
  4. Step 4: Simplify right side
    7,410.80x = 45,788,357.04
  5. Step 5: Solve for x
    x = 45,788,357.04/7,410.80
  6. Step 6: Final answer
    x = 6,178.60

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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.