Home / 13,640.40-18,813.96-9,600.72

Finding the Fourth Proportional to 13,640.40, 18,813.96 and 9,600.72

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Solution

The fourth proportional to 13,640.40, 18,813.96 and 9,600.72 is: 13,242.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.40 : 18,813.96 = 9,600.72 : x
  2. Step 2: Convert to fraction form
    13,640.40/18,813.96 = 9,600.72/x
  3. Step 3: Cross multiply
    13,640.40x = 18,813.96 × 9,600.72
  4. Step 4: Simplify right side
    13,640.40x = 180,627,562.05
  5. Step 5: Solve for x
    x = 180,627,562.05/13,640.40
  6. Step 6: Final answer
    x = 13,242.10

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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.