Home / 21,000.83-31,501.24-20,855.03

Finding the Fourth Proportional to 21,000.83, 31,501.24 and 20,855.03

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Solution

The fourth proportional to 21,000.83, 31,501.24 and 20,855.03 is: 31,282.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.83 : 31,501.24 = 20,855.03 : x
  2. Step 2: Convert to fraction form
    21,000.83/31,501.24 = 20,855.03/x
  3. Step 3: Cross multiply
    21,000.83x = 31,501.24 × 20,855.03
  4. Step 4: Simplify right side
    21,000.83x = 656,959,095.59
  5. Step 5: Solve for x
    x = 656,959,095.59/21,000.83
  6. Step 6: Final answer
    x = 31,282.54

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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.