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Finding the Fourth Proportional to 13,832.20, 20,748.30 and 12,860.20

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Solution

The fourth proportional to 13,832.20, 20,748.30 and 12,860.20 is: 19,290.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,832.20 : 20,748.30 = 12,860.20 : x
  2. Step 2: Convert to fraction form
    13,832.20/20,748.30 = 12,860.20/x
  3. Step 3: Cross multiply
    13,832.20x = 20,748.30 × 12,860.20
  4. Step 4: Simplify right side
    13,832.20x = 266,827,287.66
  5. Step 5: Solve for x
    x = 266,827,287.66/13,832.20
  6. Step 6: Final answer
    x = 19,290.30

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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.