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Finding the Fourth Proportional to 36,699.40, 55,106.70 and 21,147.40

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Solution

The fourth proportional to 36,699.40, 55,106.70 and 21,147.40 is: 31,754.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,699.40 : 55,106.70 = 21,147.40 : x
  2. Step 2: Convert to fraction form
    36,699.40/55,106.70 = 21,147.40/x
  3. Step 3: Cross multiply
    36,699.40x = 55,106.70 × 21,147.40
  4. Step 4: Simplify right side
    36,699.40x = 1,165,363,427.58
  5. Step 5: Solve for x
    x = 1,165,363,427.58/36,699.40
  6. Step 6: Final answer
    x = 31,754.29

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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.