Home / 13,140.70-18,135.83-8,673.74

Finding the Fourth Proportional to 13,140.70, 18,135.83 and 8,673.74

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Solution

The fourth proportional to 13,140.70, 18,135.83 and 8,673.74 is: 11,970.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.70 : 18,135.83 = 8,673.74 : x
  2. Step 2: Convert to fraction form
    13,140.70/18,135.83 = 8,673.74/x
  3. Step 3: Cross multiply
    13,140.70x = 18,135.83 × 8,673.74
  4. Step 4: Simplify right side
    13,140.70x = 157,305,474.10
  5. Step 5: Solve for x
    x = 157,305,474.10/13,140.70
  6. Step 6: Final answer
    x = 11,970.86

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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.