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Finding the Fourth Proportional to 14,821.21, 20,443.88 and 9,984.16

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Solution

The fourth proportional to 14,821.21, 20,443.88 and 9,984.16 is: 13,771.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,821.21 : 20,443.88 = 9,984.16 : x
  2. Step 2: Convert to fraction form
    14,821.21/20,443.88 = 9,984.16/x
  3. Step 3: Cross multiply
    14,821.21x = 20,443.88 × 9,984.16
  4. Step 4: Simplify right side
    14,821.21x = 204,114,816.80
  5. Step 5: Solve for x
    x = 204,114,816.80/14,821.21
  6. Step 6: Final answer
    x = 13,771.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.