Home / 13,209.30-18,228.13-7,240.85

Finding the Fourth Proportional to 13,209.30, 18,228.13 and 7,240.85

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Solution

The fourth proportional to 13,209.30, 18,228.13 and 7,240.85 is: 9,991.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.30 : 18,228.13 = 7,240.85 : x
  2. Step 2: Convert to fraction form
    13,209.30/18,228.13 = 7,240.85/x
  3. Step 3: Cross multiply
    13,209.30x = 18,228.13 × 7,240.85
  4. Step 4: Simplify right side
    13,209.30x = 131,987,155.11
  5. Step 5: Solve for x
    x = 131,987,155.11/13,209.30
  6. Step 6: Final answer
    x = 9,991.99

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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.