Home / 18,971.32-28,433.66-13,426.24

Finding the Fourth Proportional to 18,971.32, 28,433.66 and 13,426.24

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Solution

The fourth proportional to 18,971.32, 28,433.66 and 13,426.24 is: 20,122.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,971.32 : 28,433.66 = 13,426.24 : x
  2. Step 2: Convert to fraction form
    18,971.32/28,433.66 = 13,426.24/x
  3. Step 3: Cross multiply
    18,971.32x = 28,433.66 × 13,426.24
  4. Step 4: Simplify right side
    18,971.32x = 381,757,143.24
  5. Step 5: Solve for x
    x = 381,757,143.24/18,971.32
  6. Step 6: Final answer
    x = 20,122.86

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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.