Home / 30,770.40-42,453.38-18,827.76

Finding the Fourth Proportional to 30,770.40, 42,453.38 and 18,827.76

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Solution

The fourth proportional to 30,770.40, 42,453.38 and 18,827.76 is: 25,976.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,770.40 : 42,453.38 = 18,827.76 : x
  2. Step 2: Convert to fraction form
    30,770.40/42,453.38 = 18,827.76/x
  3. Step 3: Cross multiply
    30,770.40x = 42,453.38 × 18,827.76
  4. Step 4: Simplify right side
    30,770.40x = 799,302,049.83
  5. Step 5: Solve for x
    x = 799,302,049.83/30,770.40
  6. Step 6: Final answer
    x = 25,976.33

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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.