Home / 13,240.12-18,270.30-7,651.48

Finding the Fourth Proportional to 13,240.12, 18,270.30 and 7,651.48

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Solution

The fourth proportional to 13,240.12, 18,270.30 and 7,651.48 is: 10,558.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.12 : 18,270.30 = 7,651.48 : x
  2. Step 2: Convert to fraction form
    13,240.12/18,270.30 = 7,651.48/x
  3. Step 3: Cross multiply
    13,240.12x = 18,270.30 × 7,651.48
  4. Step 4: Simplify right side
    13,240.12x = 139,794,835.04
  5. Step 5: Solve for x
    x = 139,794,835.04/13,240.12
  6. Step 6: Final answer
    x = 10,558.43

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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.