Home / 7,931.90-11,898.42-3,188.06

Finding the Fourth Proportional to 7,931.90, 11,898.42 and 3,188.06

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Solution

The fourth proportional to 7,931.90, 11,898.42 and 3,188.06 is: 4,782.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,931.90 : 11,898.42 = 3,188.06 : x
  2. Step 2: Convert to fraction form
    7,931.90/11,898.42 = 3,188.06/x
  3. Step 3: Cross multiply
    7,931.90x = 11,898.42 × 3,188.06
  4. Step 4: Simplify right side
    7,931.90x = 37,932,876.87
  5. Step 5: Solve for x
    x = 37,932,876.87/7,931.90
  6. Step 6: Final answer
    x = 4,782.32

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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.