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Finding the Fourth Proportional to 7,961.88, 10,992.30 and 5,130.24

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Solution

The fourth proportional to 7,961.88, 10,992.30 and 5,130.24 is: 7,082.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.88 : 10,992.30 = 5,130.24 : x
  2. Step 2: Convert to fraction form
    7,961.88/10,992.30 = 5,130.24/x
  3. Step 3: Cross multiply
    7,961.88x = 10,992.30 × 5,130.24
  4. Step 4: Simplify right side
    7,961.88x = 56,393,137.15
  5. Step 5: Solve for x
    x = 56,393,137.15/7,961.88
  6. Step 6: Final answer
    x = 7,082.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.