Home / 20,818.57-31,226.49-8,971.87

Finding the Fourth Proportional to 20,818.57, 31,226.49 and 8,971.87

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Solution

The fourth proportional to 20,818.57, 31,226.49 and 8,971.87 is: 13,457.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.57 : 31,226.49 = 8,971.87 : x
  2. Step 2: Convert to fraction form
    20,818.57/31,226.49 = 8,971.87/x
  3. Step 3: Cross multiply
    20,818.57x = 31,226.49 × 8,971.87
  4. Step 4: Simplify right side
    20,818.57x = 280,160,008.84
  5. Step 5: Solve for x
    x = 280,160,008.84/20,818.57
  6. Step 6: Final answer
    x = 13,457.22

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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.