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Finding the Fourth Proportional to 7,721, 10,655.79 and 4,736.15

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Solution

The fourth proportional to 7,721, 10,655.79 and 4,736.15 is: 6,536.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721 : 10,655.79 = 4,736.15 : x
  2. Step 2: Convert to fraction form
    7,721/10,655.79 = 4,736.15/x
  3. Step 3: Cross multiply
    7,721x = 10,655.79 × 4,736.15
  4. Step 4: Simplify right side
    7,721x = 50,467,419.81
  5. Step 5: Solve for x
    x = 50,467,419.81/7,721
  6. Step 6: Final answer
    x = 6,536.38

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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.