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Finding the Fourth Proportional to 11,943, 17,914.50 and 4,647

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Solution

The fourth proportional to 11,943, 17,914.50 and 4,647 is: 6,970.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,943 : 17,914.50 = 4,647 : x
  2. Step 2: Convert to fraction form
    11,943/17,914.50 = 4,647/x
  3. Step 3: Cross multiply
    11,943x = 17,914.50 × 4,647
  4. Step 4: Simplify right side
    11,943x = 83,248,681.50
  5. Step 5: Solve for x
    x = 83,248,681.50/11,943
  6. Step 6: Final answer
    x = 6,970.50

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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.