Home / 13,507.20-18,640.88-7,540.04

Finding the Fourth Proportional to 13,507.20, 18,640.88 and 7,540.04

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Solution

The fourth proportional to 13,507.20, 18,640.88 and 7,540.04 is: 10,405.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,507.20 : 18,640.88 = 7,540.04 : x
  2. Step 2: Convert to fraction form
    13,507.20/18,640.88 = 7,540.04/x
  3. Step 3: Cross multiply
    13,507.20x = 18,640.88 × 7,540.04
  4. Step 4: Simplify right side
    13,507.20x = 140,552,980.84
  5. Step 5: Solve for x
    x = 140,552,980.84/13,507.20
  6. Step 6: Final answer
    x = 10,405.78

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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.