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Finding the Fourth Proportional to 10,999.20, 16,485.30 and 7,489.20

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Solution

The fourth proportional to 10,999.20, 16,485.30 and 7,489.20 is: 11,224.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.20 : 16,485.30 = 7,489.20 : x
  2. Step 2: Convert to fraction form
    10,999.20/16,485.30 = 7,489.20/x
  3. Step 3: Cross multiply
    10,999.20x = 16,485.30 × 7,489.20
  4. Step 4: Simplify right side
    10,999.20x = 123,461,708.76
  5. Step 5: Solve for x
    x = 123,461,708.76/10,999.20
  6. Step 6: Final answer
    x = 11,224.61

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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.