Home / 18,120.96-25,011.36-12,817.44

Finding the Fourth Proportional to 18,120.96, 25,011.36 and 12,817.44

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Solution

The fourth proportional to 18,120.96, 25,011.36 and 12,817.44 is: 17,691.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.96 : 25,011.36 = 12,817.44 : x
  2. Step 2: Convert to fraction form
    18,120.96/25,011.36 = 12,817.44/x
  3. Step 3: Cross multiply
    18,120.96x = 25,011.36 × 12,817.44
  4. Step 4: Simplify right side
    18,120.96x = 320,581,606.12
  5. Step 5: Solve for x
    x = 320,581,606.12/18,120.96
  6. Step 6: Final answer
    x = 17,691.20

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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.