Home / 20,906.60-31,359.51-8,426.29

Finding the Fourth Proportional to 20,906.60, 31,359.51 and 8,426.29

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Solution

The fourth proportional to 20,906.60, 31,359.51 and 8,426.29 is: 12,639.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.60 : 31,359.51 = 8,426.29 : x
  2. Step 2: Convert to fraction form
    20,906.60/31,359.51 = 8,426.29/x
  3. Step 3: Cross multiply
    20,906.60x = 31,359.51 × 8,426.29
  4. Step 4: Simplify right side
    20,906.60x = 264,244,325.52
  5. Step 5: Solve for x
    x = 264,244,325.52/20,906.60
  6. Step 6: Final answer
    x = 12,639.28

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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.