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Finding the Fourth Proportional to 7,261.80, 9,996.72 and 6,515.52

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Solution

The fourth proportional to 7,261.80, 9,996.72 and 6,515.52 is: 8,969.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,261.80 : 9,996.72 = 6,515.52 : x
  2. Step 2: Convert to fraction form
    7,261.80/9,996.72 = 6,515.52/x
  3. Step 3: Cross multiply
    7,261.80x = 9,996.72 × 6,515.52
  4. Step 4: Simplify right side
    7,261.80x = 65,133,829.09
  5. Step 5: Solve for x
    x = 65,133,829.09/7,261.80
  6. Step 6: Final answer
    x = 8,969.38

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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.