Home / 20,666.49-31,003.73-8,820.09

Finding the Fourth Proportional to 20,666.49, 31,003.73 and 8,820.09

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Solution

The fourth proportional to 20,666.49, 31,003.73 and 8,820.09 is: 13,231.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.49 : 31,003.73 = 8,820.09 : x
  2. Step 2: Convert to fraction form
    20,666.49/31,003.73 = 8,820.09/x
  3. Step 3: Cross multiply
    20,666.49x = 31,003.73 × 8,820.09
  4. Step 4: Simplify right side
    20,666.49x = 273,455,644.84
  5. Step 5: Solve for x
    x = 273,455,644.84/20,666.49
  6. Step 6: Final answer
    x = 13,231.84

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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.