Home / 9,681.20-13,359.68-5,489.60

Finding the Fourth Proportional to 9,681.20, 13,359.68 and 5,489.60

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Solution

The fourth proportional to 9,681.20, 13,359.68 and 5,489.60 is: 7,575.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,681.20 : 13,359.68 = 5,489.60 : x
  2. Step 2: Convert to fraction form
    9,681.20/13,359.68 = 5,489.60/x
  3. Step 3: Cross multiply
    9,681.20x = 13,359.68 × 5,489.60
  4. Step 4: Simplify right side
    9,681.20x = 73,339,299.33
  5. Step 5: Solve for x
    x = 73,339,299.33/9,681.20
  6. Step 6: Final answer
    x = 7,575.43

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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.