Home / 31,435.12-43,390.52-20,135.01

Finding the Fourth Proportional to 31,435.12, 43,390.52 and 20,135.01

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Solution

The fourth proportional to 31,435.12, 43,390.52 and 20,135.01 is: 27,792.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,435.12 : 43,390.52 = 20,135.01 : x
  2. Step 2: Convert to fraction form
    31,435.12/43,390.52 = 20,135.01/x
  3. Step 3: Cross multiply
    31,435.12x = 43,390.52 × 20,135.01
  4. Step 4: Simplify right side
    31,435.12x = 873,668,691.65
  5. Step 5: Solve for x
    x = 873,668,691.65/31,435.12
  6. Step 6: Final answer
    x = 27,792.76

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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.