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Finding the Fourth Proportional to 14,788.21, 20,410.07 and 9,405.03

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Solution

The fourth proportional to 14,788.21, 20,410.07 and 9,405.03 is: 12,980.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,788.21 : 20,410.07 = 9,405.03 : x
  2. Step 2: Convert to fraction form
    14,788.21/20,410.07 = 9,405.03/x
  3. Step 3: Cross multiply
    14,788.21x = 20,410.07 × 9,405.03
  4. Step 4: Simplify right side
    14,788.21x = 191,957,297.14
  5. Step 5: Solve for x
    x = 191,957,297.14/14,788.21
  6. Step 6: Final answer
    x = 12,980.43

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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.