Home / 7,622.80-11,431.18-3,240.40

Finding the Fourth Proportional to 7,622.80, 11,431.18 and 3,240.40

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Solution

The fourth proportional to 7,622.80, 11,431.18 and 3,240.40 is: 4,859.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,622.80 : 11,431.18 = 3,240.40 : x
  2. Step 2: Convert to fraction form
    7,622.80/11,431.18 = 3,240.40/x
  3. Step 3: Cross multiply
    7,622.80x = 11,431.18 × 3,240.40
  4. Step 4: Simplify right side
    7,622.80x = 37,041,595.67
  5. Step 5: Solve for x
    x = 37,041,595.67/7,622.80
  6. Step 6: Final answer
    x = 4,859.32

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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.