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Finding the Fourth Proportional to 7,345.80, 11,040.30 and 6,395.40

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Solution

The fourth proportional to 7,345.80, 11,040.30 and 6,395.40 is: 9,611.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,345.80 : 11,040.30 = 6,395.40 : x
  2. Step 2: Convert to fraction form
    7,345.80/11,040.30 = 6,395.40/x
  3. Step 3: Cross multiply
    7,345.80x = 11,040.30 × 6,395.40
  4. Step 4: Simplify right side
    7,345.80x = 70,607,134.62
  5. Step 5: Solve for x
    x = 70,607,134.62/7,345.80
  6. Step 6: Final answer
    x = 9,611.91

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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.