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Finding the Fourth Proportional to 43,987.74, 65,976.41 and 12,400.17

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Solution

The fourth proportional to 43,987.74, 65,976.41 and 12,400.17 is: 18,598.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,987.74 : 65,976.41 = 12,400.17 : x
  2. Step 2: Convert to fraction form
    43,987.74/65,976.41 = 12,400.17/x
  3. Step 3: Cross multiply
    43,987.74x = 65,976.41 × 12,400.17
  4. Step 4: Simplify right side
    43,987.74x = 818,118,699.99
  5. Step 5: Solve for x
    x = 818,118,699.99/43,987.74
  6. Step 6: Final answer
    x = 18,598.79

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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.