Home / 31,107.75-42,928.70-19,929.75

Finding the Fourth Proportional to 31,107.75, 42,928.70 and 19,929.75

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Solution

The fourth proportional to 31,107.75, 42,928.70 and 19,929.75 is: 27,503.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,107.75 : 42,928.70 = 19,929.75 : x
  2. Step 2: Convert to fraction form
    31,107.75/42,928.70 = 19,929.75/x
  3. Step 3: Cross multiply
    31,107.75x = 42,928.70 × 19,929.75
  4. Step 4: Simplify right side
    31,107.75x = 855,558,258.83
  5. Step 5: Solve for x
    x = 855,558,258.83/31,107.75
  6. Step 6: Final answer
    x = 27,503.06

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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.