Home / 18,980.21-28,454.12-13,416.05

Finding the Fourth Proportional to 18,980.21, 28,454.12 and 13,416.05

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Solution

The fourth proportional to 18,980.21, 28,454.12 and 13,416.05 is: 20,112.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.21 : 28,454.12 = 13,416.05 : x
  2. Step 2: Convert to fraction form
    18,980.21/28,454.12 = 13,416.05/x
  3. Step 3: Cross multiply
    18,980.21x = 28,454.12 × 13,416.05
  4. Step 4: Simplify right side
    18,980.21x = 381,741,950.99
  5. Step 5: Solve for x
    x = 381,741,950.99/18,980.21
  6. Step 6: Final answer
    x = 20,112.63

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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.