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Finding the Fourth Proportional to 7,151.36, 9,863.91 and 5,031.32

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Solution

The fourth proportional to 7,151.36, 9,863.91 and 5,031.32 is: 6,939.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,151.36 : 9,863.91 = 5,031.32 : x
  2. Step 2: Convert to fraction form
    7,151.36/9,863.91 = 5,031.32/x
  3. Step 3: Cross multiply
    7,151.36x = 9,863.91 × 5,031.32
  4. Step 4: Simplify right side
    7,151.36x = 49,628,438.34
  5. Step 5: Solve for x
    x = 49,628,438.34/7,151.36
  6. Step 6: Final answer
    x = 6,939.73

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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.