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Finding the Fourth Proportional to 29,716.74, 40,986.45 and 18,964.89

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Solution

The fourth proportional to 29,716.74, 40,986.45 and 18,964.89 is: 26,157.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,716.74 : 40,986.45 = 18,964.89 : x
  2. Step 2: Convert to fraction form
    29,716.74/40,986.45 = 18,964.89/x
  3. Step 3: Cross multiply
    29,716.74x = 40,986.45 × 18,964.89
  4. Step 4: Simplify right side
    29,716.74x = 777,303,515.74
  5. Step 5: Solve for x
    x = 777,303,515.74/29,716.74
  6. Step 6: Final answer
    x = 26,157.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.