Home / 15,212.18-20,981.25-13,091.24

Finding the Fourth Proportional to 15,212.18, 20,981.25 and 13,091.24

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Solution

The fourth proportional to 15,212.18, 20,981.25 and 13,091.24 is: 18,055.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,212.18 : 20,981.25 = 13,091.24 : x
  2. Step 2: Convert to fraction form
    15,212.18/20,981.25 = 13,091.24/x
  3. Step 3: Cross multiply
    15,212.18x = 20,981.25 × 13,091.24
  4. Step 4: Simplify right side
    15,212.18x = 274,670,579.25
  5. Step 5: Solve for x
    x = 274,670,579.25/15,212.18
  6. Step 6: Final answer
    x = 18,055.96

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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.