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Finding the Fourth Proportional to 7,684.20, 11,581.65 and 7,684.20

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Solution

The fourth proportional to 7,684.20, 11,581.65 and 7,684.20 is: 11,581.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,684.20 : 11,581.65 = 7,684.20 : x
  2. Step 2: Convert to fraction form
    7,684.20/11,581.65 = 7,684.20/x
  3. Step 3: Cross multiply
    7,684.20x = 11,581.65 × 7,684.20
  4. Step 4: Simplify right side
    7,684.20x = 88,995,714.93
  5. Step 5: Solve for x
    x = 88,995,714.93/7,684.20
  6. Step 6: Final answer
    x = 11,581.65

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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.