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Finding the Fourth Proportional to 57,860.60, 86,774.70 and 18,429.80

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Solution

The fourth proportional to 57,860.60, 86,774.70 and 18,429.80 is: 27,639.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,860.60 : 86,774.70 = 18,429.80 : x
  2. Step 2: Convert to fraction form
    57,860.60/86,774.70 = 18,429.80/x
  3. Step 3: Cross multiply
    57,860.60x = 86,774.70 × 18,429.80
  4. Step 4: Simplify right side
    57,860.60x = 1,599,240,366.06
  5. Step 5: Solve for x
    x = 1,599,240,366.06/57,860.60
  6. Step 6: Final answer
    x = 27,639.54

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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.