Home / 15,379.15-21,178.53-13,361.65

Finding the Fourth Proportional to 15,379.15, 21,178.53 and 13,361.65

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Solution

The fourth proportional to 15,379.15, 21,178.53 and 13,361.65 is: 18,400.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,379.15 : 21,178.53 = 13,361.65 : x
  2. Step 2: Convert to fraction form
    15,379.15/21,178.53 = 13,361.65/x
  3. Step 3: Cross multiply
    15,379.15x = 21,178.53 × 13,361.65
  4. Step 4: Simplify right side
    15,379.15x = 282,980,105.37
  5. Step 5: Solve for x
    x = 282,980,105.37/15,379.15
  6. Step 6: Final answer
    x = 18,400.24

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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.