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Finding the Fourth Proportional to 8,457, 12,686.30 and 2,910.12

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Solution

The fourth proportional to 8,457, 12,686.30 and 2,910.12 is: 4,365.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,457 : 12,686.30 = 2,910.12 : x
  2. Step 2: Convert to fraction form
    8,457/12,686.30 = 2,910.12/x
  3. Step 3: Cross multiply
    8,457x = 12,686.30 × 2,910.12
  4. Step 4: Simplify right side
    8,457x = 36,918,655.36
  5. Step 5: Solve for x
    x = 36,918,655.36/8,457
  6. Step 6: Final answer
    x = 4,365.46

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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.