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Finding the Fourth Proportional to 11,987.30, 17,987.02 and 8,083.50

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Solution

The fourth proportional to 11,987.30, 17,987.02 and 8,083.50 is: 12,129.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.30 : 17,987.02 = 8,083.50 : x
  2. Step 2: Convert to fraction form
    11,987.30/17,987.02 = 8,083.50/x
  3. Step 3: Cross multiply
    11,987.30x = 17,987.02 × 8,083.50
  4. Step 4: Simplify right side
    11,987.30x = 145,398,055.96
  5. Step 5: Solve for x
    x = 145,398,055.96/11,987.30
  6. Step 6: Final answer
    x = 12,129.35

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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.