Home / 20,715.69-28,587.84-11,763.38

Finding the Fourth Proportional to 20,715.69, 28,587.84 and 11,763.38

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Solution

The fourth proportional to 20,715.69, 28,587.84 and 11,763.38 is: 16,233.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.69 : 28,587.84 = 11,763.38 : x
  2. Step 2: Convert to fraction form
    20,715.69/28,587.84 = 11,763.38/x
  3. Step 3: Cross multiply
    20,715.69x = 28,587.84 × 11,763.38
  4. Step 4: Simplify right side
    20,715.69x = 336,289,625.30
  5. Step 5: Solve for x
    x = 336,289,625.30/20,715.69
  6. Step 6: Final answer
    x = 16,233.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.