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Finding the Fourth Proportional to 12,459, 18,688.50 and 4,671.48

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Solution

The fourth proportional to 12,459, 18,688.50 and 4,671.48 is: 7,007.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,459 : 18,688.50 = 4,671.48 : x
  2. Step 2: Convert to fraction form
    12,459/18,688.50 = 4,671.48/x
  3. Step 3: Cross multiply
    12,459x = 18,688.50 × 4,671.48
  4. Step 4: Simplify right side
    12,459x = 87,302,953.98
  5. Step 5: Solve for x
    x = 87,302,953.98/12,459
  6. Step 6: Final answer
    x = 7,007.22

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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.