Home / 20,992.10-31,323.69-18,785.66

Finding the Fourth Proportional to 20,992.10, 31,323.69 and 18,785.66

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Solution

The fourth proportional to 20,992.10, 31,323.69 and 18,785.66 is: 28,031.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.10 : 31,323.69 = 18,785.66 : x
  2. Step 2: Convert to fraction form
    20,992.10/31,323.69 = 18,785.66/x
  3. Step 3: Cross multiply
    20,992.10x = 31,323.69 × 18,785.66
  4. Step 4: Simplify right side
    20,992.10x = 588,436,033.67
  5. Step 5: Solve for x
    x = 588,436,033.67/20,992.10
  6. Step 6: Final answer
    x = 28,031.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.