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Finding the Fourth Proportional to 7,987.86, 11,981.79 and 3,059.01

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Solution

The fourth proportional to 7,987.86, 11,981.79 and 3,059.01 is: 4,588.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.86 : 11,981.79 = 3,059.01 : x
  2. Step 2: Convert to fraction form
    7,987.86/11,981.79 = 3,059.01/x
  3. Step 3: Cross multiply
    7,987.86x = 11,981.79 × 3,059.01
  4. Step 4: Simplify right side
    7,987.86x = 36,652,415.43
  5. Step 5: Solve for x
    x = 36,652,415.43/7,987.86
  6. Step 6: Final answer
    x = 4,588.52

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Similar ratio
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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.