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Finding the Fourth Proportional to 11,987.73, 17,987.40 and 4,972.86

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Solution

The fourth proportional to 11,987.73, 17,987.40 and 4,972.86 is: 7,461.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.73 : 17,987.40 = 4,972.86 : x
  2. Step 2: Convert to fraction form
    11,987.73/17,987.40 = 4,972.86/x
  3. Step 3: Cross multiply
    11,987.73x = 17,987.40 × 4,972.86
  4. Step 4: Simplify right side
    11,987.73x = 89,448,821.96
  5. Step 5: Solve for x
    x = 89,448,821.96/11,987.73
  6. Step 6: Final answer
    x = 7,461.70

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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.