Home / 20,893.32-31,260.87-12,889.98

Finding the Fourth Proportional to 20,893.32, 31,260.87 and 12,889.98

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Solution

The fourth proportional to 20,893.32, 31,260.87 and 12,889.98 is: 19,286.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,893.32 : 31,260.87 = 12,889.98 : x
  2. Step 2: Convert to fraction form
    20,893.32/31,260.87 = 12,889.98/x
  3. Step 3: Cross multiply
    20,893.32x = 31,260.87 × 12,889.98
  4. Step 4: Simplify right side
    20,893.32x = 402,951,989.08
  5. Step 5: Solve for x
    x = 402,951,989.08/20,893.32
  6. Step 6: Final answer
    x = 19,286.16

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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.