Home / 31,339.80-43,240.30-20,168.28

Finding the Fourth Proportional to 31,339.80, 43,240.30 and 20,168.28

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Solution

The fourth proportional to 31,339.80, 43,240.30 and 20,168.28 is: 27,826.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,339.80 : 43,240.30 = 20,168.28 : x
  2. Step 2: Convert to fraction form
    31,339.80/43,240.30 = 20,168.28/x
  3. Step 3: Cross multiply
    31,339.80x = 43,240.30 × 20,168.28
  4. Step 4: Simplify right side
    31,339.80x = 872,082,477.68
  5. Step 5: Solve for x
    x = 872,082,477.68/31,339.80
  6. Step 6: Final answer
    x = 27,826.68

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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.