Home / 18,405.31-25,400.34-10,856.06

Finding the Fourth Proportional to 18,405.31, 25,400.34 and 10,856.06

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Solution

The fourth proportional to 18,405.31, 25,400.34 and 10,856.06 is: 14,981.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.31 : 25,400.34 = 10,856.06 : x
  2. Step 2: Convert to fraction form
    18,405.31/25,400.34 = 10,856.06/x
  3. Step 3: Cross multiply
    18,405.31x = 25,400.34 × 10,856.06
  4. Step 4: Simplify right side
    18,405.31x = 275,747,678.56
  5. Step 5: Solve for x
    x = 275,747,678.56/18,405.31
  6. Step 6: Final answer
    x = 14,981.97

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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.