Home / 13,149.60-18,153.90-8,671.68

Finding the Fourth Proportional to 13,149.60, 18,153.90 and 8,671.68

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Solution

The fourth proportional to 13,149.60, 18,153.90 and 8,671.68 is: 11,971.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.60 : 18,153.90 = 8,671.68 : x
  2. Step 2: Convert to fraction form
    13,149.60/18,153.90 = 8,671.68/x
  3. Step 3: Cross multiply
    13,149.60x = 18,153.90 × 8,671.68
  4. Step 4: Simplify right side
    13,149.60x = 157,424,811.55
  5. Step 5: Solve for x
    x = 157,424,811.55/13,149.60
  6. Step 6: Final answer
    x = 11,971.83

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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.