Home / 20,981.32-31,469.74-13,166.92

Finding the Fourth Proportional to 20,981.32, 31,469.74 and 13,166.92

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Solution

The fourth proportional to 20,981.32, 31,469.74 and 13,166.92 is: 19,748.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.32 : 31,469.74 = 13,166.92 : x
  2. Step 2: Convert to fraction form
    20,981.32/31,469.74 = 13,166.92/x
  3. Step 3: Cross multiply
    20,981.32x = 31,469.74 × 13,166.92
  4. Step 4: Simplify right side
    20,981.32x = 414,359,549.00
  5. Step 5: Solve for x
    x = 414,359,549.00/20,981.32
  6. Step 6: Final answer
    x = 19,748.97

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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.