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Finding the Fourth Proportional to 10,999.80, 16,491.60 and 4,754.70

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Solution

The fourth proportional to 10,999.80, 16,491.60 and 4,754.70 is: 7,128.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.80 : 16,491.60 = 4,754.70 : x
  2. Step 2: Convert to fraction form
    10,999.80/16,491.60 = 4,754.70/x
  3. Step 3: Cross multiply
    10,999.80x = 16,491.60 × 4,754.70
  4. Step 4: Simplify right side
    10,999.80x = 78,412,610.52
  5. Step 5: Solve for x
    x = 78,412,610.52/10,999.80
  6. Step 6: Final answer
    x = 7,128.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.