Home / 7,415.80-11,120.10-4,125.40

Finding the Fourth Proportional to 7,415.80, 11,120.10 and 4,125.40

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Solution

The fourth proportional to 7,415.80, 11,120.10 and 4,125.40 is: 6,186.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,415.80 : 11,120.10 = 4,125.40 : x
  2. Step 2: Convert to fraction form
    7,415.80/11,120.10 = 4,125.40/x
  3. Step 3: Cross multiply
    7,415.80x = 11,120.10 × 4,125.40
  4. Step 4: Simplify right side
    7,415.80x = 45,874,860.54
  5. Step 5: Solve for x
    x = 45,874,860.54/7,415.80
  6. Step 6: Final answer
    x = 6,186.10

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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.