Home / 20,811.95-31,238.99-18,455.16

Finding the Fourth Proportional to 20,811.95, 31,238.99 and 18,455.16

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Solution

The fourth proportional to 20,811.95, 31,238.99 and 18,455.16 is: 27,701.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.95 : 31,238.99 = 18,455.16 : x
  2. Step 2: Convert to fraction form
    20,811.95/31,238.99 = 18,455.16/x
  3. Step 3: Cross multiply
    20,811.95x = 31,238.99 × 18,455.16
  4. Step 4: Simplify right side
    20,811.95x = 576,520,558.69
  5. Step 5: Solve for x
    x = 576,520,558.69/20,811.95
  6. Step 6: Final answer
    x = 27,701.42

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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.