Home / 30,555.11-42,156.77-19,235.91

Finding the Fourth Proportional to 30,555.11, 42,156.77 and 19,235.91

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Solution

The fourth proportional to 30,555.11, 42,156.77 and 19,235.91 is: 26,539.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,555.11 : 42,156.77 = 19,235.91 : x
  2. Step 2: Convert to fraction form
    30,555.11/42,156.77 = 19,235.91/x
  3. Step 3: Cross multiply
    30,555.11x = 42,156.77 × 19,235.91
  4. Step 4: Simplify right side
    30,555.11x = 810,923,833.61
  5. Step 5: Solve for x
    x = 810,923,833.61/30,555.11
  6. Step 6: Final answer
    x = 26,539.71

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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.