Home / 18,719.05-25,811.31-12,754.21

Finding the Fourth Proportional to 18,719.05, 25,811.31 and 12,754.21

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Solution

The fourth proportional to 18,719.05, 25,811.31 and 12,754.21 is: 17,586.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.05 : 25,811.31 = 12,754.21 : x
  2. Step 2: Convert to fraction form
    18,719.05/25,811.31 = 12,754.21/x
  3. Step 3: Cross multiply
    18,719.05x = 25,811.31 × 12,754.21
  4. Step 4: Simplify right side
    18,719.05x = 329,202,804.34
  5. Step 5: Solve for x
    x = 329,202,804.34/18,719.05
  6. Step 6: Final answer
    x = 17,586.51

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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.