Home / 15,212.30-20,981.39-13,091.38

Finding the Fourth Proportional to 15,212.30, 20,981.39 and 13,091.38

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Solution

The fourth proportional to 15,212.30, 20,981.39 and 13,091.38 is: 18,056.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,212.30 : 20,981.39 = 13,091.38 : x
  2. Step 2: Convert to fraction form
    15,212.30/20,981.39 = 13,091.38/x
  3. Step 3: Cross multiply
    15,212.30x = 20,981.39 × 13,091.38
  4. Step 4: Simplify right side
    15,212.30x = 274,675,231.51
  5. Step 5: Solve for x
    x = 274,675,231.51/15,212.30
  6. Step 6: Final answer
    x = 18,056.13

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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.