Home / 7,782.10-11,714.68-6,978.38

Finding the Fourth Proportional to 7,782.10, 11,714.68 and 6,978.38

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Solution

The fourth proportional to 7,782.10, 11,714.68 and 6,978.38 is: 10,504.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,782.10 : 11,714.68 = 6,978.38 : x
  2. Step 2: Convert to fraction form
    7,782.10/11,714.68 = 6,978.38/x
  3. Step 3: Cross multiply
    7,782.10x = 11,714.68 × 6,978.38
  4. Step 4: Simplify right side
    7,782.10x = 81,749,438.77
  5. Step 5: Solve for x
    x = 81,749,438.77/7,782.10
  6. Step 6: Final answer
    x = 10,504.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.