Home / 31,715.45-43,746.24-20,399.27

Finding the Fourth Proportional to 31,715.45, 43,746.24 and 20,399.27

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Solution

The fourth proportional to 31,715.45, 43,746.24 and 20,399.27 is: 28,137.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,715.45 : 43,746.24 = 20,399.27 : x
  2. Step 2: Convert to fraction form
    31,715.45/43,746.24 = 20,399.27/x
  3. Step 3: Cross multiply
    31,715.45x = 43,746.24 × 20,399.27
  4. Step 4: Simplify right side
    31,715.45x = 892,391,219.01
  5. Step 5: Solve for x
    x = 892,391,219.01/31,715.45
  6. Step 6: Final answer
    x = 28,137.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.