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Finding the Fourth Proportional to 11,988.76, 17,985.72 and 4,593.21

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Solution

The fourth proportional to 11,988.76, 17,985.72 and 4,593.21 is: 6,890.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988.76 : 17,985.72 = 4,593.21 : x
  2. Step 2: Convert to fraction form
    11,988.76/17,985.72 = 4,593.21/x
  3. Step 3: Cross multiply
    11,988.76x = 17,985.72 × 4,593.21
  4. Step 4: Simplify right side
    11,988.76x = 82,612,099.03
  5. Step 5: Solve for x
    x = 82,612,099.03/11,988.76
  6. Step 6: Final answer
    x = 6,890.80

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1.5x scale

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.