Home / 31,057.32-42,809.16-20,982.60

Finding the Fourth Proportional to 31,057.32, 42,809.16 and 20,982.60

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Solution

The fourth proportional to 31,057.32, 42,809.16 and 20,982.60 is: 28,922.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,057.32 : 42,809.16 = 20,982.60 : x
  2. Step 2: Convert to fraction form
    31,057.32/42,809.16 = 20,982.60/x
  3. Step 3: Cross multiply
    31,057.32x = 42,809.16 × 20,982.60
  4. Step 4: Simplify right side
    31,057.32x = 898,247,480.62
  5. Step 5: Solve for x
    x = 898,247,480.62/31,057.32
  6. Step 6: Final answer
    x = 28,922.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.