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Finding the Fourth Proportional to 7,607.80, 11,400.74 and 3,219.22

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Solution

The fourth proportional to 7,607.80, 11,400.74 and 3,219.22 is: 4,824.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,607.80 : 11,400.74 = 3,219.22 : x
  2. Step 2: Convert to fraction form
    7,607.80/11,400.74 = 3,219.22/x
  3. Step 3: Cross multiply
    7,607.80x = 11,400.74 × 3,219.22
  4. Step 4: Simplify right side
    7,607.80x = 36,701,417.12
  5. Step 5: Solve for x
    x = 36,701,417.12/7,607.80
  6. Step 6: Final answer
    x = 4,824.19

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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.