Home / 18,641.58-25,725.09-10,143.78

Finding the Fourth Proportional to 18,641.58, 25,725.09 and 10,143.78

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Solution

The fourth proportional to 18,641.58, 25,725.09 and 10,143.78 is: 13,998.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,641.58 : 25,725.09 = 10,143.78 : x
  2. Step 2: Convert to fraction form
    18,641.58/25,725.09 = 10,143.78/x
  3. Step 3: Cross multiply
    18,641.58x = 25,725.09 × 10,143.78
  4. Step 4: Simplify right side
    18,641.58x = 260,949,739.71
  5. Step 5: Solve for x
    x = 260,949,739.71/18,641.58
  6. Step 6: Final answer
    x = 13,998.27

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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.