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Finding the Fourth Proportional to 8,655.30, 12,986.15 and 8,335.30

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Solution

The fourth proportional to 8,655.30, 12,986.15 and 8,335.30 is: 12,506.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.30 : 12,986.15 = 8,335.30 : x
  2. Step 2: Convert to fraction form
    8,655.30/12,986.15 = 8,335.30/x
  3. Step 3: Cross multiply
    8,655.30x = 12,986.15 × 8,335.30
  4. Step 4: Simplify right side
    8,655.30x = 108,243,456.10
  5. Step 5: Solve for x
    x = 108,243,456.10/8,655.30
  6. Step 6: Final answer
    x = 12,506.03

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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.