Home / 8,127.32-11,220.88-6,638.80

Finding the Fourth Proportional to 8,127.32, 11,220.88 and 6,638.80

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Solution

The fourth proportional to 8,127.32, 11,220.88 and 6,638.80 is: 9,165.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,127.32 : 11,220.88 = 6,638.80 : x
  2. Step 2: Convert to fraction form
    8,127.32/11,220.88 = 6,638.80/x
  3. Step 3: Cross multiply
    8,127.32x = 11,220.88 × 6,638.80
  4. Step 4: Simplify right side
    8,127.32x = 74,493,178.14
  5. Step 5: Solve for x
    x = 74,493,178.14/8,127.32
  6. Step 6: Final answer
    x = 9,165.77

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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.