Home / 7,736.40-10,679.28-5,220

Finding the Fourth Proportional to 7,736.40, 10,679.28 and 5,220

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Solution

The fourth proportional to 7,736.40, 10,679.28 and 5,220 is: 7,205.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,736.40 : 10,679.28 = 5,220 : x
  2. Step 2: Convert to fraction form
    7,736.40/10,679.28 = 5,220/x
  3. Step 3: Cross multiply
    7,736.40x = 10,679.28 × 5,220
  4. Step 4: Simplify right side
    7,736.40x = 55,745,841.60
  5. Step 5: Solve for x
    x = 55,745,841.60/7,736.40
  6. Step 6: Final answer
    x = 7,205.66

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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.