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Finding the Fourth Proportional to 36,703.45, 55,073.40 and 20,920.60

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Solution

The fourth proportional to 36,703.45, 55,073.40 and 20,920.60 is: 31,391.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,703.45 : 55,073.40 = 20,920.60 : x
  2. Step 2: Convert to fraction form
    36,703.45/55,073.40 = 20,920.60/x
  3. Step 3: Cross multiply
    36,703.45x = 55,073.40 × 20,920.60
  4. Step 4: Simplify right side
    36,703.45x = 1,152,168,572.04
  5. Step 5: Solve for x
    x = 1,152,168,572.04/36,703.45
  6. Step 6: Final answer
    x = 31,391.29

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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.