Home / 20,689.11-31,021.87-18,925.84

Finding the Fourth Proportional to 20,689.11, 31,021.87 and 18,925.84

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Solution

The fourth proportional to 20,689.11, 31,021.87 and 18,925.84 is: 28,377.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.11 : 31,021.87 = 18,925.84 : x
  2. Step 2: Convert to fraction form
    20,689.11/31,021.87 = 18,925.84/x
  3. Step 3: Cross multiply
    20,689.11x = 31,021.87 × 18,925.84
  4. Step 4: Simplify right side
    20,689.11x = 587,114,948.12
  5. Step 5: Solve for x
    x = 587,114,948.12/20,689.11
  6. Step 6: Final answer
    x = 28,377.97

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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.