Home / 12,489.12-18,733.23-5,091.57

Finding the Fourth Proportional to 12,489.12, 18,733.23 and 5,091.57

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Solution

The fourth proportional to 12,489.12, 18,733.23 and 5,091.57 is: 7,637.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.12 : 18,733.23 = 5,091.57 : x
  2. Step 2: Convert to fraction form
    12,489.12/18,733.23 = 5,091.57/x
  3. Step 3: Cross multiply
    12,489.12x = 18,733.23 × 5,091.57
  4. Step 4: Simplify right side
    12,489.12x = 95,381,551.87
  5. Step 5: Solve for x
    x = 95,381,551.87/12,489.12
  6. Step 6: Final answer
    x = 7,637.17

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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.