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Finding the Fourth Proportional to 8,538.70, 12,808.05 and 6,810.70

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Solution

The fourth proportional to 8,538.70, 12,808.05 and 6,810.70 is: 10,216.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,538.70 : 12,808.05 = 6,810.70 : x
  2. Step 2: Convert to fraction form
    8,538.70/12,808.05 = 6,810.70/x
  3. Step 3: Cross multiply
    8,538.70x = 12,808.05 × 6,810.70
  4. Step 4: Simplify right side
    8,538.70x = 87,231,786.14
  5. Step 5: Solve for x
    x = 87,231,786.14/8,538.70
  6. Step 6: Final answer
    x = 10,216.05

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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.