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Finding the Fourth Proportional to 13,482.74, 20,118.63 and 12,081.80

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Solution

The fourth proportional to 13,482.74, 20,118.63 and 12,081.80 is: 18,028.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,482.74 : 20,118.63 = 12,081.80 : x
  2. Step 2: Convert to fraction form
    13,482.74/20,118.63 = 12,081.80/x
  3. Step 3: Cross multiply
    13,482.74x = 20,118.63 × 12,081.80
  4. Step 4: Simplify right side
    13,482.74x = 243,069,163.34
  5. Step 5: Solve for x
    x = 243,069,163.34/13,482.74
  6. Step 6: Final answer
    x = 18,028.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.