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Finding the Fourth Proportional to 36,013.80, 54,020.70 and 9,721.20

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Solution

The fourth proportional to 36,013.80, 54,020.70 and 9,721.20 is: 14,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,013.80 : 54,020.70 = 9,721.20 : x
  2. Step 2: Convert to fraction form
    36,013.80/54,020.70 = 9,721.20/x
  3. Step 3: Cross multiply
    36,013.80x = 54,020.70 × 9,721.20
  4. Step 4: Simplify right side
    36,013.80x = 525,146,028.84
  5. Step 5: Solve for x
    x = 525,146,028.84/36,013.80
  6. Step 6: Final answer
    x = 14,581.80

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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.