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Finding the Fourth Proportional to 10,800.80, 14,900.72 and 6,611.48

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Solution

The fourth proportional to 10,800.80, 14,900.72 and 6,611.48 is: 9,121.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,800.80 : 14,900.72 = 6,611.48 : x
  2. Step 2: Convert to fraction form
    10,800.80/14,900.72 = 6,611.48/x
  3. Step 3: Cross multiply
    10,800.80x = 14,900.72 × 6,611.48
  4. Step 4: Simplify right side
    10,800.80x = 98,515,812.27
  5. Step 5: Solve for x
    x = 98,515,812.27/10,800.80
  6. Step 6: Final answer
    x = 9,121.16

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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.