Home / 13,187.21-18,189.95-9,206.87

Finding the Fourth Proportional to 13,187.21, 18,189.95 and 9,206.87

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Solution

The fourth proportional to 13,187.21, 18,189.95 and 9,206.87 is: 12,699.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.21 : 18,189.95 = 9,206.87 : x
  2. Step 2: Convert to fraction form
    13,187.21/18,189.95 = 9,206.87/x
  3. Step 3: Cross multiply
    13,187.21x = 18,189.95 × 9,206.87
  4. Step 4: Simplify right side
    13,187.21x = 167,472,367.97
  5. Step 5: Solve for x
    x = 167,472,367.97/13,187.21
  6. Step 6: Final answer
    x = 12,699.61

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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.