Home / 18,505.12-25,499.28-13,188.64

Finding the Fourth Proportional to 18,505.12, 25,499.28 and 13,188.64

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Solution

The fourth proportional to 18,505.12, 25,499.28 and 13,188.64 is: 18,173.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,505.12 : 25,499.28 = 13,188.64 : x
  2. Step 2: Convert to fraction form
    18,505.12/25,499.28 = 13,188.64/x
  3. Step 3: Cross multiply
    18,505.12x = 25,499.28 × 13,188.64
  4. Step 4: Simplify right side
    18,505.12x = 336,300,824.18
  5. Step 5: Solve for x
    x = 336,300,824.18/18,505.12
  6. Step 6: Final answer
    x = 18,173.39

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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.