Home / 9,705.20-13,393.20-5,513.60

Finding the Fourth Proportional to 9,705.20, 13,393.20 and 5,513.60

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Solution

The fourth proportional to 9,705.20, 13,393.20 and 5,513.60 is: 7,608.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,705.20 : 13,393.20 = 5,513.60 : x
  2. Step 2: Convert to fraction form
    9,705.20/13,393.20 = 5,513.60/x
  3. Step 3: Cross multiply
    9,705.20x = 13,393.20 × 5,513.60
  4. Step 4: Simplify right side
    9,705.20x = 73,844,747.52
  5. Step 5: Solve for x
    x = 73,844,747.52/9,705.20
  6. Step 6: Final answer
    x = 7,608.78

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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.