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Finding the Fourth Proportional to 8,499.80, 12,750.90 and 2,655.80

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Solution

The fourth proportional to 8,499.80, 12,750.90 and 2,655.80 is: 3,984.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,499.80 : 12,750.90 = 2,655.80 : x
  2. Step 2: Convert to fraction form
    8,499.80/12,750.90 = 2,655.80/x
  3. Step 3: Cross multiply
    8,499.80x = 12,750.90 × 2,655.80
  4. Step 4: Simplify right side
    8,499.80x = 33,863,840.22
  5. Step 5: Solve for x
    x = 33,863,840.22/8,499.80
  6. Step 6: Final answer
    x = 3,984.07

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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.