Home / 8,731.09-12,039.60-6,489.28

Finding the Fourth Proportional to 8,731.09, 12,039.60 and 6,489.28

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Solution

The fourth proportional to 8,731.09, 12,039.60 and 6,489.28 is: 8,948.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,731.09 : 12,039.60 = 6,489.28 : x
  2. Step 2: Convert to fraction form
    8,731.09/12,039.60 = 6,489.28/x
  3. Step 3: Cross multiply
    8,731.09x = 12,039.60 × 6,489.28
  4. Step 4: Simplify right side
    8,731.09x = 78,128,335.49
  5. Step 5: Solve for x
    x = 78,128,335.49/8,731.09
  6. Step 6: Final answer
    x = 8,948.29

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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.