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Finding the Fourth Proportional to 7,355.79, 11,012.63 and 6,890.22

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Solution

The fourth proportional to 7,355.79, 11,012.63 and 6,890.22 is: 10,315.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,355.79 : 11,012.63 = 6,890.22 : x
  2. Step 2: Convert to fraction form
    7,355.79/11,012.63 = 6,890.22/x
  3. Step 3: Cross multiply
    7,355.79x = 11,012.63 × 6,890.22
  4. Step 4: Simplify right side
    7,355.79x = 75,879,409.03
  5. Step 5: Solve for x
    x = 75,879,409.03/7,355.79
  6. Step 6: Final answer
    x = 10,315.60

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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.