Home / 30,770.88-42,456.96-18,833.28

Finding the Fourth Proportional to 30,770.88, 42,456.96 and 18,833.28

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Solution

The fourth proportional to 30,770.88, 42,456.96 and 18,833.28 is: 25,985.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,770.88 : 42,456.96 = 18,833.28 : x
  2. Step 2: Convert to fraction form
    30,770.88/42,456.96 = 18,833.28/x
  3. Step 3: Cross multiply
    30,770.88x = 42,456.96 × 18,833.28
  4. Step 4: Simplify right side
    30,770.88x = 799,603,815.63
  5. Step 5: Solve for x
    x = 799,603,815.63/30,770.88
  6. Step 6: Final answer
    x = 25,985.73

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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.