Home / 13,414.37-18,503.42-8,640.50

Finding the Fourth Proportional to 13,414.37, 18,503.42 and 8,640.50

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Solution

The fourth proportional to 13,414.37, 18,503.42 and 8,640.50 is: 11,918.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,414.37 : 18,503.42 = 8,640.50 : x
  2. Step 2: Convert to fraction form
    13,414.37/18,503.42 = 8,640.50/x
  3. Step 3: Cross multiply
    13,414.37x = 18,503.42 × 8,640.50
  4. Step 4: Simplify right side
    13,414.37x = 159,878,664.79
  5. Step 5: Solve for x
    x = 159,878,664.79/13,414.37
  6. Step 6: Final answer
    x = 11,918.47

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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.