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Finding the Fourth Proportional to 5,609.79, 7,739.80 and 3,251.47

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Solution

The fourth proportional to 5,609.79, 7,739.80 and 3,251.47 is: 4,486.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,609.79 : 7,739.80 = 3,251.47 : x
  2. Step 2: Convert to fraction form
    5,609.79/7,739.80 = 3,251.47/x
  3. Step 3: Cross multiply
    5,609.79x = 7,739.80 × 3,251.47
  4. Step 4: Simplify right side
    5,609.79x = 25,165,727.51
  5. Step 5: Solve for x
    x = 25,165,727.51/5,609.79
  6. Step 6: Final answer
    x = 4,486.04

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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.