Home / 9,905.05-13,668.19-5,712.49

Finding the Fourth Proportional to 9,905.05, 13,668.19 and 5,712.49

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Solution

The fourth proportional to 9,905.05, 13,668.19 and 5,712.49 is: 7,882.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,905.05 : 13,668.19 = 5,712.49 : x
  2. Step 2: Convert to fraction form
    9,905.05/13,668.19 = 5,712.49/x
  3. Step 3: Cross multiply
    9,905.05x = 13,668.19 × 5,712.49
  4. Step 4: Simplify right side
    9,905.05x = 78,079,433.63
  5. Step 5: Solve for x
    x = 78,079,433.63/9,905.05
  6. Step 6: Final answer
    x = 7,882.79

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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.