Home / 14,121.60-21,198.60-8,581.20

Finding the Fourth Proportional to 14,121.60, 21,198.60 and 8,581.20

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Solution

The fourth proportional to 14,121.60, 21,198.60 and 8,581.20 is: 12,881.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,121.60 : 21,198.60 = 8,581.20 : x
  2. Step 2: Convert to fraction form
    14,121.60/21,198.60 = 8,581.20/x
  3. Step 3: Cross multiply
    14,121.60x = 21,198.60 × 8,581.20
  4. Step 4: Simplify right side
    14,121.60x = 181,909,426.32
  5. Step 5: Solve for x
    x = 181,909,426.32/14,121.60
  6. Step 6: Final answer
    x = 12,881.64

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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.