Home / 18,709.56-25,783.55-13,395.15

Finding the Fourth Proportional to 18,709.56, 25,783.55 and 13,395.15

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Solution

The fourth proportional to 18,709.56, 25,783.55 and 13,395.15 is: 18,459.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.56 : 25,783.55 = 13,395.15 : x
  2. Step 2: Convert to fraction form
    18,709.56/25,783.55 = 13,395.15/x
  3. Step 3: Cross multiply
    18,709.56x = 25,783.55 × 13,395.15
  4. Step 4: Simplify right side
    18,709.56x = 345,374,519.78
  5. Step 5: Solve for x
    x = 345,374,519.78/18,709.56
  6. Step 6: Final answer
    x = 18,459.79

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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.