Home / 38,512.80-57,785.40-20,995.20

Finding the Fourth Proportional to 38,512.80, 57,785.40 and 20,995.20

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Solution

The fourth proportional to 38,512.80, 57,785.40 and 20,995.20 is: 31,501.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,512.80 : 57,785.40 = 20,995.20 : x
  2. Step 2: Convert to fraction form
    38,512.80/57,785.40 = 20,995.20/x
  3. Step 3: Cross multiply
    38,512.80x = 57,785.40 × 20,995.20
  4. Step 4: Simplify right side
    38,512.80x = 1,213,216,030.08
  5. Step 5: Solve for x
    x = 1,213,216,030.08/38,512.80
  6. Step 6: Final answer
    x = 31,501.63

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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.