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Finding the Fourth Proportional to 8,428.80, 11,572.80 and 6,844.80

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Solution

The fourth proportional to 8,428.80, 11,572.80 and 6,844.80 is: 9,397.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.80 : 11,572.80 = 6,844.80 : x
  2. Step 2: Convert to fraction form
    8,428.80/11,572.80 = 6,844.80/x
  3. Step 3: Cross multiply
    8,428.80x = 11,572.80 × 6,844.80
  4. Step 4: Simplify right side
    8,428.80x = 79,213,501.44
  5. Step 5: Solve for x
    x = 79,213,501.44/8,428.80
  6. Step 6: Final answer
    x = 9,397.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.