Home / 31,508.32-43,455-18,930.64

Finding the Fourth Proportional to 31,508.32, 43,455 and 18,930.64

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Solution

The fourth proportional to 31,508.32, 43,455 and 18,930.64 is: 26,108.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,508.32 : 43,455 = 18,930.64 : x
  2. Step 2: Convert to fraction form
    31,508.32/43,455 = 18,930.64/x
  3. Step 3: Cross multiply
    31,508.32x = 43,455 × 18,930.64
  4. Step 4: Simplify right side
    31,508.32x = 822,630,961.20
  5. Step 5: Solve for x
    x = 822,630,961.20/31,508.32
  6. Step 6: Final answer
    x = 26,108.37

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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.