Home / 18,379.31-25,363.44-10,421.53

Finding the Fourth Proportional to 18,379.31, 25,363.44 and 10,421.53

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Solution

The fourth proportional to 18,379.31, 25,363.44 and 10,421.53 is: 14,381.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,379.31 : 25,363.44 = 10,421.53 : x
  2. Step 2: Convert to fraction form
    18,379.31/25,363.44 = 10,421.53/x
  3. Step 3: Cross multiply
    18,379.31x = 25,363.44 × 10,421.53
  4. Step 4: Simplify right side
    18,379.31x = 264,325,787.45
  5. Step 5: Solve for x
    x = 264,325,787.45/18,379.31
  6. Step 6: Final answer
    x = 14,381.71

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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.