Home / 20,766.13-31,158.32-10,903.09

Finding the Fourth Proportional to 20,766.13, 31,158.32 and 10,903.09

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Solution

The fourth proportional to 20,766.13, 31,158.32 and 10,903.09 is: 16,359.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.13 : 31,158.32 = 10,903.09 : x
  2. Step 2: Convert to fraction form
    20,766.13/31,158.32 = 10,903.09/x
  3. Step 3: Cross multiply
    20,766.13x = 31,158.32 × 10,903.09
  4. Step 4: Simplify right side
    20,766.13x = 339,721,967.21
  5. Step 5: Solve for x
    x = 339,721,967.21/20,766.13
  6. Step 6: Final answer
    x = 16,359.43

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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.