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Finding the Fourth Proportional to 13,410.58, 20,115.87 and 11,417.68

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Solution

The fourth proportional to 13,410.58, 20,115.87 and 11,417.68 is: 17,126.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,410.58 : 20,115.87 = 11,417.68 : x
  2. Step 2: Convert to fraction form
    13,410.58/20,115.87 = 11,417.68/x
  3. Step 3: Cross multiply
    13,410.58x = 20,115.87 × 11,417.68
  4. Step 4: Simplify right side
    13,410.58x = 229,676,546.43
  5. Step 5: Solve for x
    x = 229,676,546.43/13,410.58
  6. Step 6: Final answer
    x = 17,126.52

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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.