Home / 18,420.14-25,429.46-12,402.06

Finding the Fourth Proportional to 18,420.14, 25,429.46 and 12,402.06

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Solution

The fourth proportional to 18,420.14, 25,429.46 and 12,402.06 is: 17,121.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.14 : 25,429.46 = 12,402.06 : x
  2. Step 2: Convert to fraction form
    18,420.14/25,429.46 = 12,402.06/x
  3. Step 3: Cross multiply
    18,420.14x = 25,429.46 × 12,402.06
  4. Step 4: Simplify right side
    18,420.14x = 315,377,626.68
  5. Step 5: Solve for x
    x = 315,377,626.68/18,420.14
  6. Step 6: Final answer
    x = 17,121.35

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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.