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Finding the Fourth Proportional to 7,603.40, 11,390.22 and 6,777.80

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Solution

The fourth proportional to 7,603.40, 11,390.22 and 6,777.80 is: 10,153.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,603.40 : 11,390.22 = 6,777.80 : x
  2. Step 2: Convert to fraction form
    7,603.40/11,390.22 = 6,777.80/x
  3. Step 3: Cross multiply
    7,603.40x = 11,390.22 × 6,777.80
  4. Step 4: Simplify right side
    7,603.40x = 77,200,633.12
  5. Step 5: Solve for x
    x = 77,200,633.12/7,603.40
  6. Step 6: Final answer
    x = 10,153.44

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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.