Home / 13,440.24-18,556.76-8,406.90

Finding the Fourth Proportional to 13,440.24, 18,556.76 and 8,406.90

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Solution

The fourth proportional to 13,440.24, 18,556.76 and 8,406.90 is: 11,607.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.24 : 18,556.76 = 8,406.90 : x
  2. Step 2: Convert to fraction form
    13,440.24/18,556.76 = 8,406.90/x
  3. Step 3: Cross multiply
    13,440.24x = 18,556.76 × 8,406.90
  4. Step 4: Simplify right side
    13,440.24x = 156,004,846.66
  5. Step 5: Solve for x
    x = 156,004,846.66/13,440.24
  6. Step 6: Final answer
    x = 11,607.30

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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.