Home / 30,958.29-42,721.83-18,212.85

Finding the Fourth Proportional to 30,958.29, 42,721.83 and 18,212.85

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Solution

The fourth proportional to 30,958.29, 42,721.83 and 18,212.85 is: 25,133.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,958.29 : 42,721.83 = 18,212.85 : x
  2. Step 2: Convert to fraction form
    30,958.29/42,721.83 = 18,212.85/x
  3. Step 3: Cross multiply
    30,958.29x = 42,721.83 × 18,212.85
  4. Step 4: Simplify right side
    30,958.29x = 778,086,281.52
  5. Step 5: Solve for x
    x = 778,086,281.52/30,958.29
  6. Step 6: Final answer
    x = 25,133.37

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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.