Home / 30,745.86-42,430.14-18,808.98

Finding the Fourth Proportional to 30,745.86, 42,430.14 and 18,808.98

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Solution

The fourth proportional to 30,745.86, 42,430.14 and 18,808.98 is: 25,956.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,745.86 : 42,430.14 = 18,808.98 : x
  2. Step 2: Convert to fraction form
    30,745.86/42,430.14 = 18,808.98/x
  3. Step 3: Cross multiply
    30,745.86x = 42,430.14 × 18,808.98
  4. Step 4: Simplify right side
    30,745.86x = 798,067,654.66
  5. Step 5: Solve for x
    x = 798,067,654.66/30,745.86
  6. Step 6: Final answer
    x = 25,956.91

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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.