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Finding the Fourth Proportional to 11,990.68, 17,988.87 and 5,416.87

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Solution

The fourth proportional to 11,990.68, 17,988.87 and 5,416.87 is: 8,126.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,990.68 : 17,988.87 = 5,416.87 : x
  2. Step 2: Convert to fraction form
    11,990.68/17,988.87 = 5,416.87/x
  3. Step 3: Cross multiply
    11,990.68x = 17,988.87 × 5,416.87
  4. Step 4: Simplify right side
    11,990.68x = 97,443,370.24
  5. Step 5: Solve for x
    x = 97,443,370.24/11,990.68
  6. Step 6: Final answer
    x = 8,126.59

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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.