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Finding the Fourth Proportional to 55,991.55, 83,987.19 and 18,551.73

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Solution

The fourth proportional to 55,991.55, 83,987.19 and 18,551.73 is: 27,827.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,991.55 : 83,987.19 = 18,551.73 : x
  2. Step 2: Convert to fraction form
    55,991.55/83,987.19 = 18,551.73/x
  3. Step 3: Cross multiply
    55,991.55x = 83,987.19 × 18,551.73
  4. Step 4: Simplify right side
    55,991.55x = 1,558,107,672.34
  5. Step 5: Solve for x
    x = 1,558,107,672.34/55,991.55
  6. Step 6: Final answer
    x = 27,827.55

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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.