Home / 15,212.68-20,981.94-13,091.74

Finding the Fourth Proportional to 15,212.68, 20,981.94 and 13,091.74

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Solution

The fourth proportional to 15,212.68, 20,981.94 and 13,091.74 is: 18,056.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,212.68 : 20,981.94 = 13,091.74 : x
  2. Step 2: Convert to fraction form
    15,212.68/20,981.94 = 13,091.74/x
  3. Step 3: Cross multiply
    15,212.68x = 20,981.94 × 13,091.74
  4. Step 4: Simplify right side
    15,212.68x = 274,690,103.18
  5. Step 5: Solve for x
    x = 274,690,103.18/15,212.68
  6. Step 6: Final answer
    x = 18,056.65

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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.