Home / 20,636.99-28,479.38-11,205.57

Finding the Fourth Proportional to 20,636.99, 28,479.38 and 11,205.57

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Solution

The fourth proportional to 20,636.99, 28,479.38 and 11,205.57 is: 15,463.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.99 : 28,479.38 = 11,205.57 : x
  2. Step 2: Convert to fraction form
    20,636.99/28,479.38 = 11,205.57/x
  3. Step 3: Cross multiply
    20,636.99x = 28,479.38 × 11,205.57
  4. Step 4: Simplify right side
    20,636.99x = 319,127,630.12
  5. Step 5: Solve for x
    x = 319,127,630.12/20,636.99
  6. Step 6: Final answer
    x = 15,463.87

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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.