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Finding the Fourth Proportional to 11,739.20, 17,615.20 and 4,814.40

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Solution

The fourth proportional to 11,739.20, 17,615.20 and 4,814.40 is: 7,224.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,739.20 : 17,615.20 = 4,814.40 : x
  2. Step 2: Convert to fraction form
    11,739.20/17,615.20 = 4,814.40/x
  3. Step 3: Cross multiply
    11,739.20x = 17,615.20 × 4,814.40
  4. Step 4: Simplify right side
    11,739.20x = 84,806,618.88
  5. Step 5: Solve for x
    x = 84,806,618.88/11,739.20
  6. Step 6: Final answer
    x = 7,224.22

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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.