Home / 19,857.45-27,403.31-10,905.53

Finding the Fourth Proportional to 19,857.45, 27,403.31 and 10,905.53

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Solution

The fourth proportional to 19,857.45, 27,403.31 and 10,905.53 is: 15,049.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,857.45 : 27,403.31 = 10,905.53 : x
  2. Step 2: Convert to fraction form
    19,857.45/27,403.31 = 10,905.53/x
  3. Step 3: Cross multiply
    19,857.45x = 27,403.31 × 10,905.53
  4. Step 4: Simplify right side
    19,857.45x = 298,847,619.30
  5. Step 5: Solve for x
    x = 298,847,619.30/19,857.45
  6. Step 6: Final answer
    x = 15,049.65

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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.