Home / 13,290.09-18,340.11-8,187.90

Finding the Fourth Proportional to 13,290.09, 18,340.11 and 8,187.90

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Solution

The fourth proportional to 13,290.09, 18,340.11 and 8,187.90 is: 11,299.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.09 : 18,340.11 = 8,187.90 : x
  2. Step 2: Convert to fraction form
    13,290.09/18,340.11 = 8,187.90/x
  3. Step 3: Cross multiply
    13,290.09x = 18,340.11 × 8,187.90
  4. Step 4: Simplify right side
    13,290.09x = 150,166,986.67
  5. Step 5: Solve for x
    x = 150,166,986.67/13,290.09
  6. Step 6: Final answer
    x = 11,299.17

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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.