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Finding the Fourth Proportional to 12,003.21, 17,988.62 and 7,613.01

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Solution

The fourth proportional to 12,003.21, 17,988.62 and 7,613.01 is: 11,409.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,003.21 : 17,988.62 = 7,613.01 : x
  2. Step 2: Convert to fraction form
    12,003.21/17,988.62 = 7,613.01/x
  3. Step 3: Cross multiply
    12,003.21x = 17,988.62 × 7,613.01
  4. Step 4: Simplify right side
    12,003.21x = 136,947,505.88
  5. Step 5: Solve for x
    x = 136,947,505.88/12,003.21
  6. Step 6: Final answer
    x = 11,409.24

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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.