Home / 7,720.60-11,580.50-2,790.16

Finding the Fourth Proportional to 7,720.60, 11,580.50 and 2,790.16

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Solution

The fourth proportional to 7,720.60, 11,580.50 and 2,790.16 is: 4,185.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.60 : 11,580.50 = 2,790.16 : x
  2. Step 2: Convert to fraction form
    7,720.60/11,580.50 = 2,790.16/x
  3. Step 3: Cross multiply
    7,720.60x = 11,580.50 × 2,790.16
  4. Step 4: Simplify right side
    7,720.60x = 32,311,447.88
  5. Step 5: Solve for x
    x = 32,311,447.88/7,720.60
  6. Step 6: Final answer
    x = 4,185.10

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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.