Home / 7,981.64-11,940.30-7,151.72

Finding the Fourth Proportional to 7,981.64, 11,940.30 and 7,151.72

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Solution

The fourth proportional to 7,981.64, 11,940.30 and 7,151.72 is: 10,698.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.64 : 11,940.30 = 7,151.72 : x
  2. Step 2: Convert to fraction form
    7,981.64/11,940.30 = 7,151.72/x
  3. Step 3: Cross multiply
    7,981.64x = 11,940.30 × 7,151.72
  4. Step 4: Simplify right side
    7,981.64x = 85,393,682.32
  5. Step 5: Solve for x
    x = 85,393,682.32/7,981.64
  6. Step 6: Final answer
    x = 10,698.76

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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.