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Finding the Fourth Proportional to 7,935.30, 11,930.40 and 7,421.40

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Solution

The fourth proportional to 7,935.30, 11,930.40 and 7,421.40 is: 11,157.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,935.30 : 11,930.40 = 7,421.40 : x
  2. Step 2: Convert to fraction form
    7,935.30/11,930.40 = 7,421.40/x
  3. Step 3: Cross multiply
    7,935.30x = 11,930.40 × 7,421.40
  4. Step 4: Simplify right side
    7,935.30x = 88,540,270.56
  5. Step 5: Solve for x
    x = 88,540,270.56/7,935.30
  6. Step 6: Final answer
    x = 11,157.77

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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.