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Finding the Fourth Proportional to 7,199.76, 9,936.40 and 4,512.88

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Solution

The fourth proportional to 7,199.76, 9,936.40 and 4,512.88 is: 6,228.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,199.76 : 9,936.40 = 4,512.88 : x
  2. Step 2: Convert to fraction form
    7,199.76/9,936.40 = 4,512.88/x
  3. Step 3: Cross multiply
    7,199.76x = 9,936.40 × 4,512.88
  4. Step 4: Simplify right side
    7,199.76x = 44,841,780.83
  5. Step 5: Solve for x
    x = 44,841,780.83/7,199.76
  6. Step 6: Final answer
    x = 6,228.23

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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.