Home / 20,780.02-31,179.75-12,022.30

Finding the Fourth Proportional to 20,780.02, 31,179.75 and 12,022.30

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Solution

The fourth proportional to 20,780.02, 31,179.75 and 12,022.30 is: 18,039.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.02 : 31,179.75 = 12,022.30 : x
  2. Step 2: Convert to fraction form
    20,780.02/31,179.75 = 12,022.30/x
  3. Step 3: Cross multiply
    20,780.02x = 31,179.75 × 12,022.30
  4. Step 4: Simplify right side
    20,780.02x = 374,852,308.43
  5. Step 5: Solve for x
    x = 374,852,308.43/20,780.02
  6. Step 6: Final answer
    x = 18,039.07

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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.