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Finding the Fourth Proportional to 45,991.50, 68,987.25 and 13,159.50

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Solution

The fourth proportional to 45,991.50, 68,987.25 and 13,159.50 is: 19,739.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,991.50 : 68,987.25 = 13,159.50 : x
  2. Step 2: Convert to fraction form
    45,991.50/68,987.25 = 13,159.50/x
  3. Step 3: Cross multiply
    45,991.50x = 68,987.25 × 13,159.50
  4. Step 4: Simplify right side
    45,991.50x = 907,837,716.38
  5. Step 5: Solve for x
    x = 907,837,716.38/45,991.50
  6. Step 6: Final answer
    x = 19,739.25

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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.