Home / 13,230.72-18,238.08-10,431.36

Finding the Fourth Proportional to 13,230.72, 18,238.08 and 10,431.36

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Solution

The fourth proportional to 13,230.72, 18,238.08 and 10,431.36 is: 14,379.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,230.72 : 18,238.08 = 10,431.36 : x
  2. Step 2: Convert to fraction form
    13,230.72/18,238.08 = 10,431.36/x
  3. Step 3: Cross multiply
    13,230.72x = 18,238.08 × 10,431.36
  4. Step 4: Simplify right side
    13,230.72x = 190,247,978.19
  5. Step 5: Solve for x
    x = 190,247,978.19/13,230.72
  6. Step 6: Final answer
    x = 14,379.26

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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.