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Finding the Fourth Proportional to 7,878.96, 11,810.10 and 3,975.12

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Solution

The fourth proportional to 7,878.96, 11,810.10 and 3,975.12 is: 5,958.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.96 : 11,810.10 = 3,975.12 : x
  2. Step 2: Convert to fraction form
    7,878.96/11,810.10 = 3,975.12/x
  3. Step 3: Cross multiply
    7,878.96x = 11,810.10 × 3,975.12
  4. Step 4: Simplify right side
    7,878.96x = 46,946,564.71
  5. Step 5: Solve for x
    x = 46,946,564.71/7,878.96
  6. Step 6: Final answer
    x = 5,958.47

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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.