Home / 20,890.10-31,330.26-9,786.22

Finding the Fourth Proportional to 20,890.10, 31,330.26 and 9,786.22

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Solution

The fourth proportional to 20,890.10, 31,330.26 and 9,786.22 is: 14,677.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.10 : 31,330.26 = 9,786.22 : x
  2. Step 2: Convert to fraction form
    20,890.10/31,330.26 = 9,786.22/x
  3. Step 3: Cross multiply
    20,890.10x = 31,330.26 × 9,786.22
  4. Step 4: Simplify right side
    20,890.10x = 306,604,817.02
  5. Step 5: Solve for x
    x = 306,604,817.02/20,890.10
  6. Step 6: Final answer
    x = 14,677.04

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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.