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Finding the Fourth Proportional to 21,855.49, 32,786.47 and 7,059.49

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Solution

The fourth proportional to 21,855.49, 32,786.47 and 7,059.49 is: 10,590.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,855.49 : 32,786.47 = 7,059.49 : x
  2. Step 2: Convert to fraction form
    21,855.49/32,786.47 = 7,059.49/x
  3. Step 3: Cross multiply
    21,855.49x = 32,786.47 × 7,059.49
  4. Step 4: Simplify right side
    21,855.49x = 231,455,683.96
  5. Step 5: Solve for x
    x = 231,455,683.96/21,855.49
  6. Step 6: Final answer
    x = 10,590.28

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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.