Home / 18,379.35-25,363.62-10,420.11

Finding the Fourth Proportional to 18,379.35, 25,363.62 and 10,420.11

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Solution

The fourth proportional to 18,379.35, 25,363.62 and 10,420.11 is: 14,379.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,379.35 : 25,363.62 = 10,420.11 : x
  2. Step 2: Convert to fraction form
    18,379.35/25,363.62 = 10,420.11/x
  3. Step 3: Cross multiply
    18,379.35x = 25,363.62 × 10,420.11
  4. Step 4: Simplify right side
    18,379.35x = 264,291,710.40
  5. Step 5: Solve for x
    x = 264,291,710.40/18,379.35
  6. Step 6: Final answer
    x = 14,379.82

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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.