Home / 18,819.21-25,971.21-10,320.81

Finding the Fourth Proportional to 18,819.21, 25,971.21 and 10,320.81

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Solution

The fourth proportional to 18,819.21, 25,971.21 and 10,320.81 is: 14,243.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.21 : 25,971.21 = 10,320.81 : x
  2. Step 2: Convert to fraction form
    18,819.21/25,971.21 = 10,320.81/x
  3. Step 3: Cross multiply
    18,819.21x = 25,971.21 × 10,320.81
  4. Step 4: Simplify right side
    18,819.21x = 268,043,923.88
  5. Step 5: Solve for x
    x = 268,043,923.88/18,819.21
  6. Step 6: Final answer
    x = 14,243.10

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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.