Home / 20,669.76-31,039.20-20,508.48

Finding the Fourth Proportional to 20,669.76, 31,039.20 and 20,508.48

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Solution

The fourth proportional to 20,669.76, 31,039.20 and 20,508.48 is: 30,797.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.76 : 31,039.20 = 20,508.48 : x
  2. Step 2: Convert to fraction form
    20,669.76/31,039.20 = 20,508.48/x
  3. Step 3: Cross multiply
    20,669.76x = 31,039.20 × 20,508.48
  4. Step 4: Simplify right side
    20,669.76x = 636,566,812.42
  5. Step 5: Solve for x
    x = 636,566,812.42/20,669.76
  6. Step 6: Final answer
    x = 30,797.01

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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.