Home / 11,904.10-17,856.15-3,139.90

Finding the Fourth Proportional to 11,904.10, 17,856.15 and 3,139.90

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Solution

The fourth proportional to 11,904.10, 17,856.15 and 3,139.90 is: 4,709.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,904.10 : 17,856.15 = 3,139.90 : x
  2. Step 2: Convert to fraction form
    11,904.10/17,856.15 = 3,139.90/x
  3. Step 3: Cross multiply
    11,904.10x = 17,856.15 × 3,139.90
  4. Step 4: Simplify right side
    11,904.10x = 56,066,525.39
  5. Step 5: Solve for x
    x = 56,066,525.39/11,904.10
  6. Step 6: Final answer
    x = 4,709.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.