Home / 20,863.95-31,286.55-12,434.43

Finding the Fourth Proportional to 20,863.95, 31,286.55 and 12,434.43

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Solution

The fourth proportional to 20,863.95, 31,286.55 and 12,434.43 is: 18,646.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.95 : 31,286.55 = 12,434.43 : x
  2. Step 2: Convert to fraction form
    20,863.95/31,286.55 = 12,434.43/x
  3. Step 3: Cross multiply
    20,863.95x = 31,286.55 × 12,434.43
  4. Step 4: Simplify right side
    20,863.95x = 389,030,415.92
  5. Step 5: Solve for x
    x = 389,030,415.92/20,863.95
  6. Step 6: Final answer
    x = 18,646.06

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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.