Home / 8,415.45-12,629.56-4,720.79

Finding the Fourth Proportional to 8,415.45, 12,629.56 and 4,720.79

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Solution

The fourth proportional to 8,415.45, 12,629.56 and 4,720.79 is: 7,084.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.45 : 12,629.56 = 4,720.79 : x
  2. Step 2: Convert to fraction form
    8,415.45/12,629.56 = 4,720.79/x
  3. Step 3: Cross multiply
    8,415.45x = 12,629.56 × 4,720.79
  4. Step 4: Simplify right side
    8,415.45x = 59,621,520.32
  5. Step 5: Solve for x
    x = 59,621,520.32/8,415.45
  6. Step 6: Final answer
    x = 7,084.77

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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.