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Finding the Fourth Proportional to 7,765.72, 10,714.62 and 4,972.84

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Solution

The fourth proportional to 7,765.72, 10,714.62 and 4,972.84 is: 6,861.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,765.72 : 10,714.62 = 4,972.84 : x
  2. Step 2: Convert to fraction form
    7,765.72/10,714.62 = 4,972.84/x
  3. Step 3: Cross multiply
    7,765.72x = 10,714.62 × 4,972.84
  4. Step 4: Simplify right side
    7,765.72x = 53,282,090.92
  5. Step 5: Solve for x
    x = 53,282,090.92/7,765.72
  6. Step 6: Final answer
    x = 6,861.19

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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.