Home / 31,247.20-43,088.40-20,622.88

Finding the Fourth Proportional to 31,247.20, 43,088.40 and 20,622.88

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Solution

The fourth proportional to 31,247.20, 43,088.40 and 20,622.88 is: 28,437.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,247.20 : 43,088.40 = 20,622.88 : x
  2. Step 2: Convert to fraction form
    31,247.20/43,088.40 = 20,622.88/x
  3. Step 3: Cross multiply
    31,247.20x = 43,088.40 × 20,622.88
  4. Step 4: Simplify right side
    31,247.20x = 888,606,902.59
  5. Step 5: Solve for x
    x = 888,606,902.59/31,247.20
  6. Step 6: Final answer
    x = 28,437.97

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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.