Home / 28,180.80-42,232.32-21,247.68

Finding the Fourth Proportional to 28,180.80, 42,232.32 and 21,247.68

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Solution

The fourth proportional to 28,180.80, 42,232.32 and 21,247.68 is: 31,842.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.80 : 42,232.32 = 21,247.68 : x
  2. Step 2: Convert to fraction form
    28,180.80/42,232.32 = 21,247.68/x
  3. Step 3: Cross multiply
    28,180.80x = 42,232.32 × 21,247.68
  4. Step 4: Simplify right side
    28,180.80x = 897,338,821.02
  5. Step 5: Solve for x
    x = 897,338,821.02/28,180.80
  6. Step 6: Final answer
    x = 31,842.21

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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.