Home / 18,429.89-25,416.38-13,661.71

Finding the Fourth Proportional to 18,429.89, 25,416.38 and 13,661.71

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Solution

The fourth proportional to 18,429.89, 25,416.38 and 13,661.71 is: 18,840.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,429.89 : 25,416.38 = 13,661.71 : x
  2. Step 2: Convert to fraction form
    18,429.89/25,416.38 = 13,661.71/x
  3. Step 3: Cross multiply
    18,429.89x = 25,416.38 × 13,661.71
  4. Step 4: Simplify right side
    18,429.89x = 347,231,080.96
  5. Step 5: Solve for x
    x = 347,231,080.96/18,429.89
  6. Step 6: Final answer
    x = 18,840.65

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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.