Home / 7,911-11,848.95-5,129.26

Finding the Fourth Proportional to 7,911, 11,848.95 and 5,129.26

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Solution

The fourth proportional to 7,911, 11,848.95 and 5,129.26 is: 7,682.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911 : 11,848.95 = 5,129.26 : x
  2. Step 2: Convert to fraction form
    7,911/11,848.95 = 5,129.26/x
  3. Step 3: Cross multiply
    7,911x = 11,848.95 × 5,129.26
  4. Step 4: Simplify right side
    7,911x = 60,776,315.65
  5. Step 5: Solve for x
    x = 60,776,315.65/7,911
  6. Step 6: Final answer
    x = 7,682.51

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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.