Home / 31,455.52-43,410.72-20,826.88

Finding the Fourth Proportional to 31,455.52, 43,410.72 and 20,826.88

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Solution

The fourth proportional to 31,455.52, 43,410.72 and 20,826.88 is: 28,742.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,455.52 : 43,410.72 = 20,826.88 : x
  2. Step 2: Convert to fraction form
    31,455.52/43,410.72 = 20,826.88/x
  3. Step 3: Cross multiply
    31,455.52x = 43,410.72 × 20,826.88
  4. Step 4: Simplify right side
    31,455.52x = 904,109,856.15
  5. Step 5: Solve for x
    x = 904,109,856.15/31,455.52
  6. Step 6: Final answer
    x = 28,742.49

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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.