Home / 20,664.40-31,006.20-10,814.80

Finding the Fourth Proportional to 20,664.40, 31,006.20 and 10,814.80

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Solution

The fourth proportional to 20,664.40, 31,006.20 and 10,814.80 is: 16,227.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.40 : 31,006.20 = 10,814.80 : x
  2. Step 2: Convert to fraction form
    20,664.40/31,006.20 = 10,814.80/x
  3. Step 3: Cross multiply
    20,664.40x = 31,006.20 × 10,814.80
  4. Step 4: Simplify right side
    20,664.40x = 335,325,851.76
  5. Step 5: Solve for x
    x = 335,325,851.76/20,664.40
  6. Step 6: Final answer
    x = 16,227.22

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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.