Home / 13,205.30-18,223.38-7,898.78

Finding the Fourth Proportional to 13,205.30, 18,223.38 and 7,898.78

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Solution

The fourth proportional to 13,205.30, 18,223.38 and 7,898.78 is: 10,900.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.30 : 18,223.38 = 7,898.78 : x
  2. Step 2: Convert to fraction form
    13,205.30/18,223.38 = 7,898.78/x
  3. Step 3: Cross multiply
    13,205.30x = 18,223.38 × 7,898.78
  4. Step 4: Simplify right side
    13,205.30x = 143,942,515.03
  5. Step 5: Solve for x
    x = 143,942,515.03/13,205.30
  6. Step 6: Final answer
    x = 10,900.36

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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.