Home / 12,415.45-18,612.67-5,390.16

Finding the Fourth Proportional to 12,415.45, 18,612.67 and 5,390.16

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Solution

The fourth proportional to 12,415.45, 18,612.67 and 5,390.16 is: 8,080.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,415.45 : 18,612.67 = 5,390.16 : x
  2. Step 2: Convert to fraction form
    12,415.45/18,612.67 = 5,390.16/x
  3. Step 3: Cross multiply
    12,415.45x = 18,612.67 × 5,390.16
  4. Step 4: Simplify right side
    12,415.45x = 100,325,245.07
  5. Step 5: Solve for x
    x = 100,325,245.07/12,415.45
  6. Step 6: Final answer
    x = 8,080.68

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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.