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Finding the Fourth Proportional to 20,561.84, 30,801.65 and 9,453.30

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Solution

The fourth proportional to 20,561.84, 30,801.65 and 9,453.30 is: 14,161.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.84 : 30,801.65 = 9,453.30 : x
  2. Step 2: Convert to fraction form
    20,561.84/30,801.65 = 9,453.30/x
  3. Step 3: Cross multiply
    20,561.84x = 30,801.65 × 9,453.30
  4. Step 4: Simplify right side
    20,561.84x = 291,177,190.68
  5. Step 5: Solve for x
    x = 291,177,190.68/20,561.84
  6. Step 6: Final answer
    x = 14,161.05

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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.