Home / 7,132.45-9,842.78-3,988.64

Finding the Fourth Proportional to 7,132.45, 9,842.78 and 3,988.64

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Solution

The fourth proportional to 7,132.45, 9,842.78 and 3,988.64 is: 5,504.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,132.45 : 9,842.78 = 3,988.64 : x
  2. Step 2: Convert to fraction form
    7,132.45/9,842.78 = 3,988.64/x
  3. Step 3: Cross multiply
    7,132.45x = 9,842.78 × 3,988.64
  4. Step 4: Simplify right side
    7,132.45x = 39,259,306.02
  5. Step 5: Solve for x
    x = 39,259,306.02/7,132.45
  6. Step 6: Final answer
    x = 5,504.32

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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.