Home / 12,155.09-18,232.61-3,390.21

Finding the Fourth Proportional to 12,155.09, 18,232.61 and 3,390.21

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Solution

The fourth proportional to 12,155.09, 18,232.61 and 3,390.21 is: 5,085.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.09 : 18,232.61 = 3,390.21 : x
  2. Step 2: Convert to fraction form
    12,155.09/18,232.61 = 3,390.21/x
  3. Step 3: Cross multiply
    12,155.09x = 18,232.61 × 3,390.21
  4. Step 4: Simplify right side
    12,155.09x = 61,812,359.80
  5. Step 5: Solve for x
    x = 61,812,359.80/12,155.09
  6. Step 6: Final answer
    x = 5,085.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.