Home / 20,453.51-28,225.36-13,379.78

Finding the Fourth Proportional to 20,453.51, 28,225.36 and 13,379.78

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Solution

The fourth proportional to 20,453.51, 28,225.36 and 13,379.78 is: 18,463.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,453.51 : 28,225.36 = 13,379.78 : x
  2. Step 2: Convert to fraction form
    20,453.51/28,225.36 = 13,379.78/x
  3. Step 3: Cross multiply
    20,453.51x = 28,225.36 × 13,379.78
  4. Step 4: Simplify right side
    20,453.51x = 377,649,194.51
  5. Step 5: Solve for x
    x = 377,649,194.51/20,453.51
  6. Step 6: Final answer
    x = 18,463.78

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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.