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Finding the Fourth Proportional to 36,013.20, 53,973.90 and 20,218.20

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Solution

The fourth proportional to 36,013.20, 53,973.90 and 20,218.20 is: 30,301.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,013.20 : 53,973.90 = 20,218.20 : x
  2. Step 2: Convert to fraction form
    36,013.20/53,973.90 = 20,218.20/x
  3. Step 3: Cross multiply
    36,013.20x = 53,973.90 × 20,218.20
  4. Step 4: Simplify right side
    36,013.20x = 1,091,255,104.98
  5. Step 5: Solve for x
    x = 1,091,255,104.98/36,013.20
  6. Step 6: Final answer
    x = 30,301.53

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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.