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Finding the Fourth Proportional to 6,431.36, 8,865.60 and 5,031.68

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Solution

The fourth proportional to 6,431.36, 8,865.60 and 5,031.68 is: 6,936.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.36 : 8,865.60 = 5,031.68 : x
  2. Step 2: Convert to fraction form
    6,431.36/8,865.60 = 5,031.68/x
  3. Step 3: Cross multiply
    6,431.36x = 8,865.60 × 5,031.68
  4. Step 4: Simplify right side
    6,431.36x = 44,608,862.21
  5. Step 5: Solve for x
    x = 44,608,862.21/6,431.36
  6. Step 6: Final answer
    x = 6,936.15

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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.