Home / 7,518.18-11,281.32-3,138.65

Finding the Fourth Proportional to 7,518.18, 11,281.32 and 3,138.65

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Solution

The fourth proportional to 7,518.18, 11,281.32 and 3,138.65 is: 4,709.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,518.18 : 11,281.32 = 3,138.65 : x
  2. Step 2: Convert to fraction form
    7,518.18/11,281.32 = 3,138.65/x
  3. Step 3: Cross multiply
    7,518.18x = 11,281.32 × 3,138.65
  4. Step 4: Simplify right side
    7,518.18x = 35,408,058.61
  5. Step 5: Solve for x
    x = 35,408,058.61/7,518.18
  6. Step 6: Final answer
    x = 4,709.66

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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.