Home / 13,155.45-18,153.55-7,185.85

Finding the Fourth Proportional to 13,155.45, 18,153.55 and 7,185.85

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Solution

The fourth proportional to 13,155.45, 18,153.55 and 7,185.85 is: 9,915.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.45 : 18,153.55 = 7,185.85 : x
  2. Step 2: Convert to fraction form
    13,155.45/18,153.55 = 7,185.85/x
  3. Step 3: Cross multiply
    13,155.45x = 18,153.55 × 7,185.85
  4. Step 4: Simplify right side
    13,155.45x = 130,448,650.87
  5. Step 5: Solve for x
    x = 130,448,650.87/13,155.45
  6. Step 6: Final answer
    x = 9,915.94

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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.