Home / 13,631.86-20,421.72-11,424.81

Finding the Fourth Proportional to 13,631.86, 20,421.72 and 11,424.81

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Solution

The fourth proportional to 13,631.86, 20,421.72 and 11,424.81 is: 17,115.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.86 : 20,421.72 = 11,424.81 : x
  2. Step 2: Convert to fraction form
    13,631.86/20,421.72 = 11,424.81/x
  3. Step 3: Cross multiply
    13,631.86x = 20,421.72 × 11,424.81
  4. Step 4: Simplify right side
    13,631.86x = 233,314,270.87
  5. Step 5: Solve for x
    x = 233,314,270.87/13,631.86
  6. Step 6: Final answer
    x = 17,115.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.