Home / 18,811.56-28,161.96-13,903.08

Finding the Fourth Proportional to 18,811.56, 28,161.96 and 13,903.08

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Solution

The fourth proportional to 18,811.56, 28,161.96 and 13,903.08 is: 20,813.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.56 : 28,161.96 = 13,903.08 : x
  2. Step 2: Convert to fraction form
    18,811.56/28,161.96 = 13,903.08/x
  3. Step 3: Cross multiply
    18,811.56x = 28,161.96 × 13,903.08
  4. Step 4: Simplify right side
    18,811.56x = 391,537,982.84
  5. Step 5: Solve for x
    x = 391,537,982.84/18,811.56
  6. Step 6: Final answer
    x = 20,813.69

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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.