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Finding the Fourth Proportional to 8,487, 12,730.50 and 2,331

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Solution

The fourth proportional to 8,487, 12,730.50 and 2,331 is: 3,496.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,487 : 12,730.50 = 2,331 : x
  2. Step 2: Convert to fraction form
    8,487/12,730.50 = 2,331/x
  3. Step 3: Cross multiply
    8,487x = 12,730.50 × 2,331
  4. Step 4: Simplify right side
    8,487x = 29,674,795.50
  5. Step 5: Solve for x
    x = 29,674,795.50/8,487
  6. Step 6: Final answer
    x = 3,496.50

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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.