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Finding the Fourth Proportional to 8,257.80, 12,386.70 and 7,336.20

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Solution

The fourth proportional to 8,257.80, 12,386.70 and 7,336.20 is: 11,004.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,257.80 : 12,386.70 = 7,336.20 : x
  2. Step 2: Convert to fraction form
    8,257.80/12,386.70 = 7,336.20/x
  3. Step 3: Cross multiply
    8,257.80x = 12,386.70 × 7,336.20
  4. Step 4: Simplify right side
    8,257.80x = 90,871,308.54
  5. Step 5: Solve for x
    x = 90,871,308.54/8,257.80
  6. Step 6: Final answer
    x = 11,004.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.