Home / 31,397.05-43,339.32-20,790.10

Finding the Fourth Proportional to 31,397.05, 43,339.32 and 20,790.10

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Solution

The fourth proportional to 31,397.05, 43,339.32 and 20,790.10 is: 28,697.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,397.05 : 43,339.32 = 20,790.10 : x
  2. Step 2: Convert to fraction form
    31,397.05/43,339.32 = 20,790.10/x
  3. Step 3: Cross multiply
    31,397.05x = 43,339.32 × 20,790.10
  4. Step 4: Simplify right side
    31,397.05x = 901,028,850.91
  5. Step 5: Solve for x
    x = 901,028,850.91/31,397.05
  6. Step 6: Final answer
    x = 28,697.88

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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.