Home / 20,732.68-31,066.38-12,929.80

Finding the Fourth Proportional to 20,732.68, 31,066.38 and 12,929.80

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Solution

The fourth proportional to 20,732.68, 31,066.38 and 12,929.80 is: 19,374.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,732.68 : 31,066.38 = 12,929.80 : x
  2. Step 2: Convert to fraction form
    20,732.68/31,066.38 = 12,929.80/x
  3. Step 3: Cross multiply
    20,732.68x = 31,066.38 × 12,929.80
  4. Step 4: Simplify right side
    20,732.68x = 401,682,080.12
  5. Step 5: Solve for x
    x = 401,682,080.12/20,732.68
  6. Step 6: Final answer
    x = 19,374.34

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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.