Home / 7,880.63-11,812.97-5,109.06

Finding the Fourth Proportional to 7,880.63, 11,812.97 and 5,109.06

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Solution

The fourth proportional to 7,880.63, 11,812.97 and 5,109.06 is: 7,658.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.63 : 11,812.97 = 5,109.06 : x
  2. Step 2: Convert to fraction form
    7,880.63/11,812.97 = 5,109.06/x
  3. Step 3: Cross multiply
    7,880.63x = 11,812.97 × 5,109.06
  4. Step 4: Simplify right side
    7,880.63x = 60,353,146.96
  5. Step 5: Solve for x
    x = 60,353,146.96/7,880.63
  6. Step 6: Final answer
    x = 7,658.42

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1.5x scale

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.